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Slack, Steve asked the Naked Scientists: I have a question:To retain the fizz in a half empty 2 litre coke bottle, is it a good idea to squeeze the bottle until there is very little air left, or does it make no difference?ThanksSteve SlackWhat do you think?
To keep the fizz the best is to open the bottle as little as possible, as well as not squeezing it. If you do that you reduce the pressure when you close the bottle again, and then more gas can come out of solution until it reaches equilibrium again with the bottle pressurised out to be rigid again.
Steve-science-Spangler says these "fizz-keeper" pumps don't help ...[attachment=12342]some disagree.