It's especially important to keep the bottle tightly sealed while it is out of the refrigerator since the higher temperature makes the gas want to leave the liquid. Pour yourself a glass of refreshing soda, cap the bottle, and put it right back in the refrigerator. Keep it cold… keep the fizz.
Should you squeeze air out of soda bottle?
Squeezing the air out and then closing the bottle will result in a slight vacuum which will allow the smaller bubbles to expand sooner and will take longer to generate a pressure in the bottle. This removes more of the gas and leaves your soda flatter.
How do you keep an open soda fizzy?
https://www.youtube.com/watch?v=PRsyBlQSpxc
How do you make soda less flat?
- Transfer contents of carbonated beverage into bottle.
- Slightly shake, to build up pressure. Open lid to release pressure.
- Repeat step 2, shaking a bit more each time, until all carbonation (or as much as needed) is gone.