- 3 hours ago
Discover the surprising truths behind the everyday objects you use. Many of these items have hidden features designed to simplify your life, yet we often overlook their true purposes. In this video, we reveal how to utilize these common tools effectively, and you might just realize you've been doing it all wrong until now. Get ready to change the way you interact with your surroundings!
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00:00Black stripes on yellow school buses aren't an element of design.
00:04They're actually metal rails put along the sides and the back of the bus to protect its rather thin walls.
00:11In case of a collision, they absorb most of its force.
00:14It means that the crash doesn't affect large areas.
00:17These rub rails are also positioned in strategically important spots.
00:22The lowest one runs at the floor level.
00:24The middle one matches the bottom of the seats, and the top one corresponds either to the top of the
00:29seats or the bottom of the window.
00:32Your ceiling fan can move in more than one direction for a reason.
00:36One is for summer, the other for winter.
00:39When the weather is hot, ceiling fans should move counterclockwise.
00:43This makes them pull the warm air up and push the cold air down.
00:48And the clockwise, winter mode, moves the warm air down and raises the cool air.
00:55As soon as you notice the blue bristles on your toothbrush start fading, it's a sure sign it's time to
01:00replace it.
01:02You can adjust your stapler so that it staples documents together only temporarily.
01:07It's done by rotating the crimp area.
01:10Most staplers have two options for stapling.
01:13One is standard, but the other side bends staples away from the center.
01:17Later, when you don't need them anymore, you can easily remove them by hand.
01:23Lots of people use a knife to remove strawberry stems.
01:27But this way, they throw away a lot of stuff they could otherwise eat.
01:31Instead of a knife, use a regular drinking straw.
01:34Insert one end of the straw into the bottom of the strawberry and push it gently all the way through.
01:40If everything goes as planned, the straw will pop the stem out.
01:44A tiny hole in a padlock bottom helps to drain the water from an outside lock after the rain.
01:50It prevents the thing from rusting and clogging.
01:53You can also use this hole to oil the lock's hinges so that it doesn't get stuck.
01:58If a lock doesn't have this small hole, you should only use it inside.
02:04It's a bad idea to place dirty dishes covered in mashed potatoes or any other leftover carbs closer to the
02:11sides of the bottom shelf of your dishwasher.
02:14Several studies have shown that such plates get washed better when you put them in the middle of the rack.
02:20So now you know.
02:22Weird markings on the bottom of a toothpaste tube have nothing to do with the ingredients.
02:27They're actually there for the factory robots.
02:29Not so they can brush their own teeth, either.
02:32Such a colorful square marks the line where the tube has to be cut and folded.
02:38Now, most cotton pads have two different textures on each of their sides.
02:42One surface is firmer and more absorbent.
02:45It's supposed to be used with nail polish remover.
02:48The other side is way finer and softer.
02:51You should use it to remove facial and eye makeup.
02:55Don't peel post-it notes off from the bottom.
02:58It'll create a crease in the paper, and the note won't stick well after that.
03:02Tear it off from the side, and it'll stick longer.
03:07When driving when it's already dark, you might get blinded by the headlights of the car moving behind yours.
03:13If you have a manual rearview mirror, find a tab at the bottom and flip it.
03:18The mirror has a reflective material behind its glass.
03:21By flipping the tab, you change the angle of this material, dimming the lights in the mirror.
03:27The whole process is even simpler if you have a power mirror.
03:30All you need to do is switch on the nighttime mode.
03:35Bath foam relieves stress, cleanses the skin, and keeps the water warm.
03:40Foam is made up of tiny air bottles.
03:43They form an insulating layer on the water surface, keeping the heat from escaping.
03:49Let's say you're reading a paper book.
03:51Then you decide to take a break and realize you don't have a bookmark.
03:56Should you leave a dog ear?
03:58You don't need to.
03:59That's what the dust jacket is for.
04:02Apparently, providing you with the information about the book and its author isn't its only purpose.
04:08Your stomach growls, and suddenly, a peanut butter sandwich sounds like a great idea.
04:14You open a jar and see quite a lot of oil sitting on the top.
04:19Duh!
04:20Time to train your arm muscles and stir, stir, stir!
04:23But if you store peanut butter jars upside down, the oil will move to the bottom, and all the solids
04:30will be on top.
04:32The main purpose of the drawer under your oven isn't to store all those pots and pans.
04:38You're supposed to use this place to keep your food warm while something else is being prepared in the oven.
04:45If you don't have anywhere to put a toothpick after using it, snap off the flat end at the first
04:51groove and put it on the table.
04:53Now, you can balance the used part of your toothpick on the groove part, so it doesn't have to touch
04:59the table.
05:00The correct way to break off a piece of Toblerone chocolate bar is by pushing the pointy side downward.
05:07Me? I just bite it off, but then I'm hardly ever accused of being correct.
05:13Most extension cords are known to come undone at even the slightest pull.
05:18Loosely tie them together, and they'll stay connected even if you accidentally pull on them.
05:24The knot might get tighter, but nothing will get switched off.
05:28A little groove on the bottom of a cup lets cool air get underneath it.
05:33It saves glassware from cracking when a scorching beverage heats it up.
05:37And when you place cups upside down in the dishwasher, the groove prevents water from gathering in the cup's bottoms.
05:46Nonstick pans have a special coating, which makes them so great.
05:50But if you use metal utensils while dealing with such a pan, you're likely to scratch this coating.
05:56And once you do it, your pan is ruined.
05:59Food will stick to its surface and end up burned or unevenly cooked.
06:06Make your life brighter and get a bright side tee.
06:09Pick your own print, just follow the link below.
06:11If you've always peeled bananas, starting from the stem, try doing it the other way around.
06:17Pinch the bottom of the banana and pull.
06:20This way, you don't have to deal with strings and mess.
06:23By the way, that's the approach monkeys use.
06:26And you don't want to argue with monkeys.
06:30Most caps on small tubes are hollow on top and have a little spike inside.
06:35Its purpose is to break the foil sticker sealing the tube.
06:39The neck of the tube fits right in this hole, and the spike is designed to break the seal.
06:44No need to struggle trying to tear the tiny foil seal off with your fingers.
06:49The more detergent you use, the cleaner your clothes are, right?
06:53Not exactly.
06:55If you add too much detergent, you can spoil your things.
06:58This will produce too many suds, and your clothes won't be rubbing against one another.
07:03And that's exactly what helps them get clean.
07:06Excess suds can also keep your washing machine from rinsing properly.
07:11Book pages are often printed on large sheets of paper, rather than on small individual ones.
07:17If there isn't enough content to fill these sheets, there are blank pages left.
07:22Publishers often print the words notes or leave some other signs on them.
07:26This way, readers don't think it's a printing mistake.
07:30The rumble strips on the side of the road are supposed to wake up sleepy drivers
07:35who start to doze off behind the wheel.
07:37When your tires drift off onto these strips, the noise and vibration work like an alarm clock.
07:44It's a popular misconception that pumping a mascara wand back and forth allows more product to stay on it.
07:52In reality, doing this will only spoil your mascara.
07:56By moving the wand, you push air inside the tube.
07:59This not only produces flakes and clumps, but also makes the mascara dry out.
08:05A dime-sized hole in the elevator doors is a keyhole.
08:09If the doors get stuck, an operator can open them manually by inserting a special key in this hole.
08:16The same tool is used when an elevator needs routine maintenance.
08:21The bubbles in your soda push the straw up when they balance the buoyancy with the mass of the straw.
08:26But you can keep your straw from rising in your soda can by putting it through the hole in the
08:32metal pull ring.
08:33Ah, the science behind soda cans!
08:37Those squares of fabric that come with clothes are for you to try out your cleaning products on them first.
08:42This way, you won't ruin the entire item once you decide to wash it.
08:47The soft, round part under a soda bottle cap keeps the bubbles from escaping.
08:52Without it, your pop would go flat in no time, probably even before you buy it.
08:58And what's worse, if you bought the flat drink for your dad, then your pop's pop won't pop.
09:05The utility knife is supposed to last way longer than most people think.
09:09The knife blade is made of narrow, parallel sections.
09:12When the instrument gets blunt, break off the top section with a cap you can find at the bottom.
09:19Voila! You have a brand new sharp blade again.
09:22But don't forget to put on a pair of safety gloves and goggles before doing this.
09:27Yes, it's another sharp tip from Brightside.
09:32Have you ever wondered what these extra holes at the top of your running shoes are for?
09:37They're designed so that you can tie the shoes in multiple different ways.
09:41That's useful when you want to compensate for things such as a bad stride or even a damaged toe.
09:47Plus, you can change the look of your shoes the way you prefer.
09:53Many people use a dust jacket of their book as a bookmarker.
09:57No problem with that.
09:59It will save your book from bent page corners.
10:01But the primary purpose of a dust cover is to keep the book safe from distortions.
10:06For instance, if you spill juice or drop some of the food on your book while reading it.
10:12The tic-tac dispenser has this little groove on its top, so you can dispense only one tic-tac at
10:18a time.
10:19Even though, let's be honest here, nobody does that.
10:22Most of us just spill a whole bunch at once and then we wiggle all those extra tic-tacs back
10:27in.
10:29Those rubber bumps you see between the tire treads are there for your safety.
10:33The raised edges tell you what the minimum height of your tread is.
10:37If the bump and the edges are even, it's time for you to visit the tire shop as soon as
10:43possible.
10:43But if the bumps are well beneath the level of the edges, you're good to go.
10:49What about that black grating on the microwave window?
10:52It's something called a Faraday shield.
10:55And it's there to prevent microwaves from getting away and turning the entire room into a Faraday cage.
11:01If the microwaves escape, your meal won't cook properly either.
11:05So yep, the cage is not there to make it difficult for you to see your meal while it's cooking.
11:10It's keeping the electromagnetic energy inside.
11:15How about a wrench-compatible screwdriver?
11:18Cover your screwdriver with the end of your wrench and you can increase its torque.
11:22That's why the head of your screwdriver is designed the way it is.
11:25When you have odd angles, you can use this strategy.
11:30You've probably heard those myths, the blue side of the eraser can erase the pen.
11:35False.
11:36Its purpose is to erase a pencil.
11:38But in case you're writing something on heavier paper.
11:41The blue side can remove smudges you see after using the pink eraser too.
11:47Have you ever wondered why oranges in supermarkets mostly come in the red mesh bag?
11:53It's a trick to make this food look more orange and encourage you to make a purchase.
11:58An extra tip.
11:59Don't throw away the mesh bag.
12:00Tie it up so you can have a small pot scrubber to clean your sink, kitchen, appliances, and dishes.
12:09You can see golf balls don't have a perfectly round shape.
12:12Their surface is covered with many little dimples, something golf balls didn't always have.
12:18At one point, experienced golfers started noticing how through time,
12:22older balls with imperfections, such as nicks and bumps, could travel further.
12:28Such things create turbulence in the air around the golf ball, which eventually reduces drag.
12:34So, manufacturers started producing balls with dimples so they could go farther and faster.
12:42You might have noticed that sometimes there are ridges in toothpick tops.
12:46It's more hygienic because when you break that off, you can prop the toothpick up on it,
12:50and it won't touch anything.
12:54Another safety feature you'll find, this time in your car, is a tab on your rearview mirror.
13:01With it, you can change the position of the mirror, so you don't get blinded if there's a car behind
13:05you with its high beams on.
13:07So, this little tab helps you control the glare of lights coming from behind.
13:12This feature showed up in the 1930s, but in the early 1970s, it became a part of standard equipment in
13:19most trucks and cars.
13:22Do you see that tiny hole on your iPhone right next to the rear-facing camera?
13:26It's a microphone, and it's there so your phone can record sound as you turn your camera around.
13:34Some cables have a thick cylinder towards the end of the cord.
13:38It's called a ferrite cord, or a choke.
13:41It's a magnetic iron oxide that stops high-frequency electromagnetic interference.
13:47For example, you know that annoying static noise you get if you bring your phone too close to a speaker?
13:53This interrupts your call, which is why cable cords with big cylinders are pretty useful, because they prevent these things.
14:01Do you know why nearly all luggage bags and backpacks have two zippers?
14:06It's way more convenient and easier to open in that way.
14:09But not just that, you can also lock these two zippers together to keep the stuff inside your bags safer.
14:17You know how toilets at public spots like malls have those big gaps at the bottom?
14:23It's primarily for better circulation of air.
14:26This type of door also makes it easier to clean the toilet or check if it's occupied if you're standing
14:31in line.
14:33Other than that, if you get stuck there and the lock gets broken, you still have a way to escape.
14:39You can just crawl out.
14:42Ever notice those plastic end caps on utility knives?
14:46And they also have scales on them, which indicates you may use them multiple times, but with sharp edges.
14:53You can separate the blades through these plastic end caps.
14:56Then, you can move the slider and bring the sharp blade to the front.
15:01If you've ever taken a moment to examine a regular grocery cart, especially their fold-out section,
15:07you probably noticed those metal loops jutting out.
15:10They're designed to protect the items you carry in your cart.
15:14You can use them to hang bags with soft items.
15:18You don't want to accidentally squish with heavier products, like bread,
15:22or easily breakable things, like eggs.
15:26Many coffee mugs come with curved notches on their bottom.
15:30When you're washing your mugs, put them against the rack at an angle in your dishwasher.
15:34This way, the water won't pool in there,
15:37so your favorite cup will be completely dry by the time you take it out of the dishwasher.
15:42If you're a McFlurry fan, you've probably noticed there's a square hole in the handle of the spoon.
15:48It's there so you can attach it to the special machine that mixes the ice cream and your favorite toppings
15:54together.
15:55The machine has a bar that slips into this square-shaped spoon and then thoroughly stirs it.
16:01And you get the spoon so they can minimize the mess during the process.
16:05Quite neat, wouldn't you say?
16:08A regular milk jug has a dent on one side.
16:12Some might see it as a random design decision, but a dent has several purposes.
16:17One of them is to get bigger if there's a gas buildup.
16:21This happens when your milk is spoiled.
16:23So you don't even have to try to check this out.
16:26Also, the dent is there so the jug doesn't burst if you accidentally drop it.
16:31The dent allows the expansion space that deals with the sudden pressure that happens when you drop the jug.
16:39Dental floss.
16:40Sure, it's important for your dental health, and it's easy to assume what you do with it.
16:44But dental floss is great in the kitchen as well, because it's a very precise cake slicer, way better than
16:51a regular knife.
16:55Most kitchen shears have a serrated opening right there at the center where the blades and handles meet.
17:01It's something you can use to trim difficult herbs such as rosemary, thyme, or chives.
17:07Because of this opening, you don't need to pick the leaves off by hand, but de-stem them in one
17:12motion.
17:14The majority of gelatin containers or single-serving yogurts come with a tinfoil lid.
17:20And in most cases, you can use this covering as a disposable spoon.
17:25Just peel away the covering, and after a couple of simple folds, you'll have a perfect little spoon for your
17:30midday snack.
17:33If you ever find yourself stuck in the trunk of your car, stay calm.
17:37All cars are supposed to be equipped with an emergency latch to help open the trunk from the inside,
17:43in the unlikely case it happens.
17:45These latches are so well thought out that they can be opened by people of all ages.
17:50More so, handles are designed to glow in the dark, too.
17:53You can even pull them with a mouth if there's not enough wiggle room to use your hands.
17:58Never mind how you ended up in the trunk in the first place.
18:01Moving on!
18:02If you're ever working with needle and thread, remember, you don't need to stick the needle directly into the spool.
18:08You may end up losing the needle altogether.
18:11Not to mention you can easily hurt your fingers!
18:14A lot of modern sewing kits these days come with a designated place for safeguarding the needles.
18:20It's located at the bottom part of the thread spool.
18:23You'll just need to pull it out.
18:24It's even made to hold multiple sewing needles at a time.
18:29Disposable ballpoint pens come with a little secret of their own.
18:32Did you ever notice that in some of them, there's a small hole in the plastic part?
18:37It's actually a rudimentary ventilation system.
18:41It's supposed to let the ink easily make it to the tip of the pen.
18:45Okay, I know it's in the name, but you really don't need to shake the seasoning shaker to get any
18:50product out.
18:51Don't believe me?
18:53Hey, you're not the only one.
18:54Go grab your favorite seasoning bottle out of your pantry.
18:58If it has one of those removable plastic caps, it's perfect for the experiment.
19:02Instead of shaking the bottle, try holding it from the plastic cap while it's upside down.
19:08Now gently twist the bottle from side to side and, before you know it, you get some gorgeously flowing seasoning
19:15without having to wiggle the shaker and make a mess all over the stove.
19:20On the same note, most salt and pepper shakers should have ridges on the bottom of the glass portion.
19:26In case you get any seasoning stuck in there, place the bottom of the salt shaker against the bottom of
19:32the pepper shaker and wiggle it around so the ridges click with each other.
19:36The seasoning should easily pour out now without you having to open the bottle.
19:41In colder weather, you often have so many clothing layers on you that you can hardly feel the purse or
19:47back straps on your shoulder anymore, not to mention how fast they can slide off.
19:52Some jackets come with a built-in solution for that, in the form of a small tab on the shoulder
19:58with either a hook or a button.
20:00It's meant to be opened and closed comfortably, so you can keep your purse in place at any time.
20:07You're most likely using it merely to peel the skin of potatoes, carrots, or cucumbers.
20:12But you can use your vegetable peeler for chopping fine strips of onion as well.
20:17Just cut the onion into quarters vertically and then start slicing.
20:21This might also help out with those embarrassing onion tears.
20:26Most people miss this one, but should you ever have a closer look at your toothpaste tube,
20:31You will surely see some sort of coloring there, either a dot or a block.
20:36Colors can vary.
20:38They can be black, green, red, or even blue.
20:41These color spots are actually meant to help the assembly machines back at the toothpaste factory.
20:46They recognize when and where these machines need to cut the toothpaste tubes and proceed to fold them for packaging.
20:53For most types of footwear, if there's anything that seems a bit out of place, always know that it's there
20:59for a reason.
20:59Most manufacturers don't put extra items on shoes just for fun.
21:04It would definitely be a waste of time and resources.
21:07For footwear, like boots, for example, there's often a small loop at the top back of the shoe.
21:13It's there to help you when you need to put the shoe on, since you can quickly pull on it.
21:17Plus, you can also hang the shoes somewhere, most likely to dry, since most boots are meant to be worn
21:23in the colder weather.
21:24Now, I've been guilty at least once of overdressing with a bunch of layers, just so I won't need to
21:31jam everything in my check-in bag.
21:33But does it become a problem when you actually have to get seated?
21:37What do you do with your coat or your jacket?
21:40Well, have a closer look next time you board a plane on the seat in front of you.
21:44The hook that keeps the tray table upright can double as a jacket hook.
21:49As long as you don't need to have any meals while in the air, you're good to go.
21:54Now, most mascaras expire within 3-6 months, I'm told, depending on the manufacturer.
22:00But you can help speed up that process if you're not careful enough.
22:04Continuously pumping the mascara wand, trying to mix in the product, actually pushes more air into the tube.
22:11This can make it dry much faster, and you evidently won't get the desired results with it anymore.
22:17There's an easy way to check if your mascara is still good enough to use.
22:21If you don't hear a popping noise when you take the brush out, you may very well need to go
22:26get yourself a new mascara tube.
22:29Now, I know we're living in the era of Bluetooth-connected devices.
22:33But for better quality sound, they still recommend using headphones that connect via audio jacks.
22:40Remember seeing black ridges on those jacks?
22:42They aren't there just to make them fit when you plug them into your phone or laptop.
22:47Made out of a special insulating material, these bands are meant to guard the wires when sound is being transmitted.
22:54Based on the number of bands, you can figure out which end goes where.
22:58Some empty space under noodles in a cup doesn't mean the company producing them wants to cheat you out of
23:04a full portion.
23:05No, no.
23:06It's a manner of keeping the noodles intact during their transportation.
23:10It also helps with the circulation of hot water that is poured over the products before you can enjoy them.
23:16The V-shaped neckline was initially designed to serve a bunch of objectives.
23:21First, as a way of prolonging the life of the garment that would maintain its shape over the years.
23:26It's also there to fit your head through the shirt in case it needs some stretching.
23:31This way, it ensures a snugger grip around the neck.
23:34Lastly, it helps absorb sweat in case you're wearing the shirt while exercising.
23:39Now, it's not necessarily a custom anymore, but you may have stumbled upon a dinner jacket with an additional mysterious
23:47pocket on the right side.
23:49Turns out, this pocket was used by men to easily reach their train tickets, since most of them had to
23:55travel to work every day.
23:56It helped them keep their jacket buttoned up, but also benefited from the use of a pocket.
24:02Now, it's only added as a decoration, and it doesn't serve an actual purpose anymore.
24:07Speaking of things we don't use these days, or at least for their initial purpose, did you know Play-Doh
24:13was originally a cleaning product?
24:16In the 1920s, the market was in need of a product that could help them wipe the wallpapered areas around
24:22coal-burning furnaces.
24:23The recipe for what we now know as Play-Doh was thus invented.
24:28It was manufactured in white only, and was supposed to clean wallpaper by being rolled back and forth over the
24:34dirt.
24:35It was only later, in the 1940s, that new products for cleaning wallpaper were brought up, and Play-Doh was
24:42redirected toward another area of the market.
24:45Now, while I enjoy a nice piece of toast for breakfast, isn't it pesky to have to clean out the
24:51toaster?
24:52Well, not anymore, since I recently found out that toasters have a slide or a panel at the bottom that
24:59helps get rid of all those annoying breadcrumbs easily.
25:05Now, there used to be a time when you could only have access to video games by inserting cartridges in
25:11your console of choice.
25:12These tiny objects gave many doctors a lot of headaches.
25:16People soon started popping up in hospitals after swallowing small game cartridges, especially the younger generation.
25:24Nintendo, the company that manufactures the majority of these devices, had to come up with a creative solution to prevent
25:31these accidents.
25:32So, these days, Nintendo Switch cartridges are purposely coated with specific chemicals that can leave a really bad bitter taste
25:40in the mouth.
25:41Not that I'd, you know, recommend you ever try and taste for yourself.
25:44Hmm.
25:46You're trying on a pair of jeans, a dress, or a jacket, and are about to dig your hand into
25:51the pocket when you realize there's no depth to it.
25:55The pocket is simply not there.
25:57But why would anyone create pockets you can't put anything in?
26:01And now would be a good time to pick your iPhone up from off the floor.
26:05Well, the reason for fake pockets is simple.
26:08If a clothing item has a specific cut or shape, pockets may spoil it.
26:13They can alter the item's shape, either in the warehouse or already on the retail rack.
26:18The solution?
26:19Getting rid of pockets in key areas.
26:22Plus, fake pockets are obviously cheaper, and they don't get stretched out.
26:27Interestingly, this practice goes back to the 17th century.
26:31That's when pockets were actually removable.
26:33They resembled small bags, and women, for example, could move them from one outfit to another.
26:39Unfortunately, it was also very convenient for pickpockets.
26:43They could grab such a pocket and run off with it.
26:46Then, clothes became more streamlined, and slim pockets started to be sewn right into them instead of attachable bags.
26:54This was believed to make the shape of a person's silhouette more alluring.
26:58But soon, slimmer skirts came into fashion, and pockets went out of it.
27:03And people started using handbags instead.
27:06These days, most pockets are real.
27:09But some of them are still fake.
27:11So, how can we make sure that we don't actually turn a fake pocket into a hole, thinking it's a
27:17real one?
27:17Well, first of all, take a look at the stitching along the edge of the pocket, where it's supposed to
27:22open up.
27:23If you see a single loose thread, just snip a piece of it and start pulling gently.
27:28If the pocket is real, the thread will easily come out.
27:32But if you feel that the stitching won't budge, most likely, you have a faux pocket on your hands.
27:38If this is the case, just leave it be.
27:42Now, let's move on to some other everyday objects that may be hiding some secrets.
27:47For example, those lines on some kinds of chips.
27:50For one thing, they help with the distribution of spices and seasonings.
27:54In other words, all those substances that make your chips taste like cheese are mostly stored inside the lines.
28:01Plus, the lines make chips crunchier.
28:05Highlighters are filled with a special semi-transparent fluorescent ink that can glow in dim light.
28:11Yellow and light green hues are the most popular because they don't prevent you from seeing the text after black
28:17and white photocopying.
28:19Photocopiers perceive yellow and light green marks as almost non-existent and don't print them.
28:25Now, back in the day, the first jeans had one problem.
28:29Workers and miners, who were the original jeans wearers, put too much pressure on the poor piece of clothing.
28:35As a result, the seams couldn't withstand the stress and tore.
28:39So, tiny metal studs were invented to prevent this from happening.
28:44Most metallic zippers have a hidden lock inside them.
28:47That's why you shouldn't leave the zipper handle in an upward position.
28:51When you pull it downwards, it automatically locks.
28:54It's all thanks to several tiny grooves hidden underneath the handle.
28:59Now, about those horizontal lines on plastic bottles.
29:03They help hold bottles up.
29:04Some bottles are produced from soft plastic.
29:07Without the lines, they wouldn't keep their shape.
29:10Instead, they would twist easily or even break.
29:13Bath foam isn't only for fun or a nice smell.
29:16It helps regulate the temperature, too.
29:19The bubbles keep the water hot.
29:21And you can enjoy your bath a bit longer.
29:23With or without your rubber ducky.
29:26Ever notice that layer of clear liquid in gel pens?
29:30It's called the ink follower or stopper fluid.
29:33The gel in such pens contains pigment particles dissolved in a polymer solution.
29:38The gel should be thick enough to keep the pigment particles suspended, but also thin enough to flow first onto
29:45the ball and then the paper.
29:47The main task of the stopper fluid is to be a barrier to prevent the gel from evaporating or leaking
29:53out.
29:54Without this transparent fluid, your gel pen wouldn't function.
29:57The fluid always stays in one position and doesn't get dissolved with the gel.
30:02Neither does it move backward or flow out of the pen.
30:05The holes in the bottoms of your earphones allow air to circulate up and through the speakers.
30:11It allows to increase low frequencies, making the bass sound deeper.
30:16The quality of the sound also becomes much better.
30:19Some plastic milk containers have dents on their sides.
30:22Try as they might, they just cannot park without some damage.
30:27Nah, I made that up.
30:28These dents serve several purposes.
30:30For one thing, when milk spoils, this process usually causes swelling and high-pressure buildup inside the container.
30:38Oh boy.
30:38That's when the dent comes in handy.
30:40It pops out and doesn't let the jug blow up.
30:43Plus, if you ever decide to freeze the milk, it will expand like any other liquid.
30:48And then again, the indentation will pop out and prevent the container from breaking inside your freezer.
30:54That's a good thing.
30:56Airplane windows have rounded edges, and that's a crucial safety measure.
31:01It prevents aircraft accidents.
31:03Weak spots are usually situated in the corners.
31:06If airplane windows were square or rectangular, each of them would have four potential weak spots.
31:12Under pressure, they would collapse.
31:15If you look closely at a tram's overhead lines, you'll see that its contact wires zigzag back and forth instead
31:22of going in a straight line.
31:24The thing is that all trams have pantographs attached to their roofs.
31:28The upper part of the pantograph is gradually worn down by the overhead wire and eventually needs to be replaced.
31:35To wear it down evenly, the wire is not installed strictly along the tram's path, but in zigzag patterns.
31:42As the tram moves, the pantograph slides along the wire, and it wears down evenly.
31:48You might have wondered why some gas cans have two holes with caps, one bigger and one smaller.
31:55Before, I thought that the little hole was used when you poured something into a smaller container.
32:00But I was wrong.
32:01A very infrequent occasion.
32:03In reality, you're supposed to uncap it before you pour the gas inside the bigger hole to prevent it from
32:09glugging and spilling on your clothes and on the ground.
32:13Most of the buttonholes on a shirt are vertical, but the top and sometimes bottom ones are horizontal.
32:20The reason is simple.
32:21These two buttons slip out more often than others.
32:24Luckily, producers have found the solution that can prevent these buttons from slipping out.
32:30Horizontal buttonholes.
32:31What engineering!
32:32Buttons tend to slip out less from such buttonholes.
32:36Sticks sachets of sugar or salt are easier to open than many people think.
32:41There's no need to tear off one of the ends.
32:43The right way is actually to tear them down the middle.
32:47Some boots have loops sticking out on the back.
32:50Their main purpose is to help you pull your shoes on easier.
32:53Just tug on the loop while you're pushing your heel into the boot.
32:57You can also use these loops to hang your boots on a hook when they're dirty or when you want
33:02to dry them after washing.
33:03Or you can run your laces through the loop if you want to tie them around your ankle.
33:08When you're on board the plane, you might spot a little triangle over your seat.
33:13Such triangles show the flight crew the best spots to check the plane's flaps through the window, just in case
33:19they're flapping.
33:20If your shoes are really slippery, just take a bit of sandpaper and rub it on the soles for better
33:26traction.
33:27They'll become more grippy, and you'll be able to wear them out in the rain.
33:31Now, if they get too wet, they might turn griping.
33:34But that's only if you have talking shoes.
33:37If you drill several holes at the bottom of your garbage can, putting in and taking out trash bags will
33:43become much easier.
33:45You won't have any problems with suction.
33:48You can usually find some silica gel in bags, shoes, and many other things you buy.
33:53This shell absorbs excess moisture.
33:56Don't throw it away.
33:57Each time your shoes get wet, put a few packets of silica gel inside.
34:02The thermos wasn't actually invented to keep your coffee warm.
34:06It was made by a Scottish scientist who just wanted a safe place to put his chemicals at a stable
34:12temperature.
34:12So, he took two bottles, put the smaller one inside the bigger one, and vacuumed out the air between them.
34:19Well, anyway, thanks for the hot coffee!
34:21I'll see you next time.
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