Obviously the hiss is co2 escaping from the bottle. But what I don’t get is why if I turn the cap just a little it’ll hiss then no more air will come out. Even if I squeeze the bottle no more air will come out. I can turn the cap a little more and get another hiss and I can repeat until all the gas is out.
In: Physics
When you open it à bit the pressure from inside is pushing up on the cap pushing the seal away from the lip. Once a bit of pressure gets out the cap can come down a bit and reseal. Turning à bit more repeats this until the cap is far enough away from the lip to not form a seal
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