To keep fizz from escaping an opened carbonated drink, squeeze all of the air out of the bottle and put the cap back on.

The claim that squeezing all the air out of a bottle of carbonated drink and capping it will keep the fizz from escaping is misleading. While it is true that reducing the amount of air in the bottle can help minimize the oxidation process, it does not effectively prevent carbonation loss. Carbonated beverages release carbon dioxide (CO2) when opened, and the pressure inside the bottle decreases, leading to the escape of gas regardless of the air volume. The primary factor affecting fizz retention is the pressure of CO2 in the liquid, which is not significantly altered by merely squeezing out air. Furthermore, the sources reviewed do not provide credible support for the claim, often relying on anecdotal evidence or unverified methods. Therefore, while some techniques may help retain carbonation to a degree, the method described in the claim is not scientifically sound.