Dear Wine Master,
How long does a bottle of wine last after it is opened?
Dear Wine Lover,
There are two ways of looking at this question: generally speaking wine will be at it’s best almost immediately after it has been uncorked; alternatively wine will continue to improve after opening until its taste is unacceptable . . . to you! In other words the answer to your question is very much a case of personal choice.
Once a bottle of wine has been uncorked it is open to attack from the air. The chemicals react, and the wine will begin to oxidise. This can be a slow process, but you will be able to detect changes of smell and taste. Have a look at www.Tainted-Wine.com for further comments on oxidation.
For most people the emphasis will be on trying to keep the wine as fresh as possible for as long as possible. Without assistance an opened bottle of white wine will be past its best after a couple of days, with reds not far behind. You can help delay the onset of oxidation by remembering to recork the bottle, and storing it in a cool place.
There is another ‘trick’ that you might like to try. Without exposure to oxygen the wines will remain fresh. If you create a vacuum in the bottle AFTER opening, then oxidation can be prevented. I would recommend to you the Wine Sealer on www.WineThingsUK.com under the winecare section. It is inexpensive, reusable, and very effective.