Sure, it's cold in the fridge, but it isn't some cryogenic chamber for champagne and other sparkling wine.
43+ How Long Does Champagne Last Once Opened
PNG. About one day in the fridge open at the top or with a cork or stopper in it for a few days. After this point, it'll go flat, and its lovely flavors will have evaporated.
How Long Does Wine Last Does It Go Bad Wine Folly from media.winefolly.com
How long does champagne last? If you don't have a fancy ice bucket (who does?), simply fill your kitchen sink with ice and put the champagne bottle in it along with any other booze you'd like to keep cold. If one does not have the cork or a stopper to close the bottle, then a piece of plastic wrap and rubber band can be used so that the champagne does not go flat before the specified time frame.
In the case of unopened vintage champagne, it can last for up to ten years.
Champagne is a living product, they change over time. Some drinks start to go bad once you open the bottle and have a limited shelf life after that. Putting the bottle in the fridge: If champagne was refrigerated when it was bought, it should continue to be refrigerated until it is opened.
