eli5 – Why do tennis balls come in a plastic container that has a pop top?

Question

eli5 – Why do tennis balls come in a plastic container that has a pop top?

In: 545

Answer 1

Tennis balls are pressurized at the factory, to give them better bounciness. Because the balls are porous, they’ll eventually lose their extra pressure. Putting them in a pressurized metal container means they won’t start losing their extra pressure until you pop the top of the container.