These are the best ways to preserve the last few glasses of your open bottle.
Re-cork It Right The first rule of preserving your wine is to replace the cork correctly. While the “clean” side may seem easier to fit in the bottle, resist. The stained side has already been exposed to the wine, and it tasted fine. That “clean” side may not be so clean, and it can taint what you’re planning to drink in a day or two.
Use Half Bottles Air flattens your wine, lessening flavours and aromas. To minimise air exposure, use a funnel to pour the remaining vino into a screw-cap half bottle. Even if there’s a little air at the top, it’s far less than in a regular bottle.
Refrigerate It It’s amazing how often people will keep leftover wine on the counter after they’ve recorked it. You wouldn’t do that with food, so don’t with wine. The cool temp can’t stop exposed wine from breaking down, but it can slow the process significantly.
Don’t “Open” It If popping high-end bottles is what you call Wednesday (or you’re itching to taste those gems in your cellar), it may be time for a Coravin. This device, which looks much like a Rabbit opener, pierces the cork with a needle and tops the bottle with argon gas. Pour what you want, remove the needle and the cork will seal naturally. Many restaurants use it to sell top-shelf wines by the glass. (There are other wine preservation options as well, of course).
Finish It Look, there are roughly five glasses of wine in a regular 750-ml bottle. If you and yours have two glasses each and split that last glass—all while eating a decent-sized dinner—it’s not bad. In fact, according to recent studies, 1–3 glasses a day may improve your heart health.
Source: Wine Enthusiast magazine