Why do plastic bottles “suck” themselves in when the plane is descending?

Question

Why do plastic bottles “suck” themselves in when the plane is descending?

In: 3

Answer 1

They’re getting crushed, actually. Believe it or not, the air that’s all around us has weight. As you get closer to the ground, there’s more air so it weighs more. But since you can’t add more air to a sealed bottle, the extra air weight outside the bottle crushes it.