Beer Advocate - Defending Vacu Vin
QuoteGiving a bottle a few pumps to pull the oxygen out isn’t going to suddenly strip the carbonation from the beer. That’s not how it works. It simply pulls the oxygen out of the airspace in the bottle, thus curbing oxidation for a short period of time. And as a result, if a Vacu Vin seal is applied soon after opening the bottle, the bottle will still yield plenty of carbonation upon opening it the following day and often, beyond.