The tab on a tin can, which we use to open it, has two holes—one smaller than the other. If you turn the tab around and place the smaller hole over the can’s opening, you can slide a straw through it, keeping it in place.

Image: frame harirak

Have you ever noticed the small bumps on the F and J keys of every computer keyboard? These bumps are tactile information that lets you know where your fingers are placed on the keyboard without having to look at them.

Image: Jan Loyde Cabrera

Most people think the hole in the middle of a pasta scoop is just a strainer for draining excess water. While it does serve that purpose, it is actually designed to measure a single serving of spaghetti.

Image: María Sainz Cabezalí

The drawer beneath an oven is designed to keep food warm without cooking it further. In some models, it functions as a broiler drawer, it can be used for grating cheese. A heating element above the drawer allows for high-heat cooking.

Image: Andrea Davis

Some clothing items come with a small piece of extra fabric, matching the garment's material. This fabric isn’t meant as a patch for repairs but rather for testing in the washing machine, allowing you to check how it reacts to different wash cycles before laundering the entire garment.

Image: PlanetCare

The hole at the end of most pan handles is designed to hold a wooden spoon, preventing messes on the kitchen counter. Simply slide the handle of the wooden spoon into the hole, letting the spoon rest over the pan when not in use.

Image: Mara Conan Design

Hidden away at the bottom of your toaster’s side is a small removable tray designed to catch and collect crumbs. You can slide it out to dispose of the crumbs and slide it back in for easy cleanup.

Image: Daniel Salgado

Most people who do laundry know that the bottle cap on laundry detergent is used to pour the liquid into the washing machine. However, not everyone notices that these caps have markings inside to measure the correct amount of detergent for a single wash cycle.

Image: Julianna Arjes

When your utility knife blade starts to show signs of wear, you can break off the end segment to reveal a fresh, sharp edge. To do this, remove the detachable plastic piece from the back of the knife. This piece has a small slot where you can insert the blade’s end segment and snap it off safely. Once done, simply reattach the plastic piece, and your knife is ready to use again.

Image: ds_30

Many tire manufacturers embed colored threads near the outer edge of tires to indicate when they need to be replaced. These thread lines help measure tread depth. When the tread wears down to the level of these colored lines, it signals that the tire is approaching the end of its usable life and may need to be replaced.

Image: Jaye Haych

If you've ever wondered what the bulging part on the sides of a pint glass is for—besides aesthetics—the answer can be found in bars and pubs everywhere. When glasses are stacked, they can sometimes get stuck together. However, pint glasses with a bulging design prevent this from happening.

Image: tito pixel

Tic Tac containers have an oval-shaped indentation in the lid, where a single Tic Tac can fit snuggly. This design functions as a dispenser for individual servings. Instead of shaking the container like a salt shaker, simply tilt it on its side, open the lid slowly, and a single candy will appear on it.

Image: jarmoluk