system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does CO2 seem to stay suspended better in some liquids more than others?

I have a bottle of club soda on my desk and I was noticing that there are no bubbles around the edge like with soda or beer, yet it is highly carbonated, so much so that aggressive sips nearly shoot out my nose. 

I would think something like soda would hold carbonation better than plain water, yet if I leave a coke out overnight it will be flat, while club soda will still pack a fizzy punch.

My question is, why so much variation between carbonated products?
gpt
Without writing an essay on solutions thermodynamics to give a rigorous explanation, the basic idea is that CO2 (and other gases) have a certain equilibrium solubility that they would "prefer" to be in. How much CO2 a liquid can hold depends on its temperature, pressure, and composition. If the temperature and pressure of your proverbial coke and club soda are the same, the only remaining difference is the composition. Perhaps something in your soda (like the sugar or phosphoric acid) interacts with the CO2 in a way that "pushes" it out of solution more than plain water would.

Another explanation could lie in the container you're storing your drinks in. While it won't affect the amount of CO2 in your drink at equilibrium, a rough container can make your drink approach equilibrium faster than a smooth container.