A Cork’s Role in Aging Wine May 10, 2022 Email Many wines need to age to achieve their peak flavor. The purpose of corking a bottle of wine is to allow a small amount of oxygen — about one milligram per year — into the bottle. Too much oxygen and wine will taste flatter, like cooked fruit. Too little oxygen and it will taste more acidic and meatier. If your wine tastes acidic, you can decant it to improve its flavor before drinking.