A drinking straw is a long and skinny tube that you can use to drink liquids without having to bring the cup or glass very close to your mouth. It works by using suction to draw the liquid up the straw and into your mouth.
The straw is usually made of either plastic or paper, and has two openings - one at each end. One end of the straw goes into your drink, and the other end goes in your mouth.
When you suck on the straw, you create a low-pressure area inside the straw. This makes the liquid in the cup or glass want to move up the straw and into your mouth, which is an area of higher pressure.
The bending of the straw helps to make it easier to angle the straw towards your mouth. So when you're drinking something like a milkshake or a smoothie, you can bend the straw to reach the bottom of the cup or glass without tilting it.
Overall, a drinking straw is a simple tool that helps make drinking easier and more fun!