eli5 – why does tapping the top of a pop can make it fizz less? Or is that just a myth I’ve been practicing for 30+ years?

Question

What the title says. Pop means soda btw.

In: 1560

Answer 1

it’s a myth. What really happens is, as you tap the can, you’re basically giving the fizz time to settle down. You get identical results if you just wait and do nothing special with your can. You can prove this with a simple experiment with two cans more or less identically shaken. Tap one, and don’t tap the other, they’ll both behave the same when they’re opened.