The Vacuum Stopper will hold the vacuum for days, and your wine will be preserved for the next serving.
Important: Stopper Assembly is designed for use ONLY with crystal decanter provided. Other decanters are not designed for vacuum pressure.
Why decant your wine? Some people try to aerate a wine by simply uncorking it an hour or so before serving, but the amount of air exposed to the wine in this manner is far too small to have any significant influence.
To aerate a wine effectively, you should decant it. This means pouring it into a decanter or carafe. As you pour, the wine picks up oxygen, which opens up or enhances both the flavor and aroma of most red wines. (White wines may also benefit from decanting although the effect is less pronounced.) After pouring, the wine is ready to serve.