A fact from Fizz-Keeper appeared on Wikipedia's Main Page in the Did you know column on 24 May 2009 (check views). The text of the entry was as follows:
Did you know... that fizz keepers, which are claimed to pump air into bottles of fizzy drink and thereby stop them going flat, do not actually work in this way according to Henry's Law and Dalton's Law?
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This article extensively relies on too few reference citations throughout. Reference citations are expected to be diverse wherever possible to avoid possible WP:NPOV issues. Therefore, the more citaitons needed tag has been inserted into this article. 98.178.191.34 (talk) 23:16, 22 July 2021 (UTC)[reply]
Plastic soda bottles expand somewhat due to the dissociation of CO2, and pre-pressurizing the bottle at least eliminates the required volume of CO2 dissociation to change the volume and internal pressure of the bottle... the numbers are complicated to determine the exact gain from using a pump but it's non-zero, contrary to the "research". Even with a rigid glass bottle the extra pressure increases the partial pressure of CO2 in the bottom before any dissociation and through to the system achieving equilibrium. 2605:59C8:27C:F10:7573:E0ED:DB89:7ED (talk) 03:25, 21 February 2023 (UTC)[reply]
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