Hi I read everyone saying that the capsules (12g) contain liquid CO2 but when you shake them, even when half empty you can't hear any liquid "sloshing" about inside. I have found the same with CO2 fire extinguishers which everyone says contains liquid. Is it a common misconception that they contain liquid or is the liquid existing at some kind of double phase (half way between liquid and gas similar to it's triple point)?
I know the question is a bit "sciency" but I thought someone here would know and its been bugging me for a while.