Keeping opened wine bottles: what really works?

The short answer

Close the bottle again, put it in the fridge, red wine included, and leave as little air in the bottle as possible. Only then is it worth thinking about accessories.

Sources differ on how long opened wine keeps this way: white and rosé in the fridge roughly two to seven days, red wine three to five days, sparkling wine with a tight stopper one to three days. The taste already changes slightly after the first day. Some sweet and fortified wines keep longer; vintage Port, according to Decanter, should instead be drunk within a few days.

Why opened wine fades

The decisive factor is oxygen. Once the bottle is open, the wine reacts with the air in the neck and with any air that gets in while pouring. The emptier the bottle, the more air there is relative to the remaining wine. Putting the cork back keeps new air out, but does nothing about the air already inside.

How to tell a wine has faded: fruit and aroma seem dull, the colour looks tired or brownish, and in worse cases vinegary notes appear. In terms of taste the wine is then usually past it.

What reliably helps without accessories

The fridge, even for red wine: cold slows oxidation down. A red wine in the fridge keeps better than one standing in a warm room. Give it some time to warm up again before the next glass.

Decanting into a smaller bottle: if half a bottle is left, pour it into a clean small bottle with a screwcap. That leaves hardly any air above the wine. Wine Spectator calls this the best method for leftover wine.

Using the original closure: if the wine has a screwcap, that is already a good, tight closure. With a cork, push it back in firmly and store the bottle upright.

Vacuum pumps: a small advantage, no miracles

Sources contradict each other on vacuum pumps. Wine Spectator is sceptical: the pumps remove only part of the oxygen and the stoppers often leak. Decanter credits a widely used hand pump with one to two extra days compared with simply resealing. America’s Test Kitchen found a manual pump usable for a week, while electric pumps did worse there.

A master’s thesis at the University of Missouri measured clearly less oxygen after vacuum sealing than with other closures, found no negative effect on white wine aroma, but a decline in some aroma compounds in red wine. We did not find a peer-reviewed study of ordinary consumer hand pumps.

Our conclusion from the sources: a well-sealing hand pump can gain a day or two, especially together with the fridge. Weeks are not realistic.

Inert gas: mixed results

Inert gas sprays lay a blanket of heavy gases over the wine. In a Decanter comparison a Sauvignon Blanc kept with inert gas stayed freshest. In a trial with oxygen measurement by a home-winemaking author, however, inert gas did worse than vacuum, and a University of Burgundy study of a professional dispensing system reported changes to the wine caused by gases.

These are all small trials. If you want to use inert gas, check the can for what exactly it contains, since some products are a mixture rather than pure argon. And there are running costs.

Sparkling wine: stopper and cold, not a spoon

The spoon in the neck is a myth. In a trial for the Champagne committee, pressure in open bottles dropped in the same way with and without a spoon; only a stopper or cork held the gas in. In a blind test by Stanford University chemist Richard Zare, the spoon likewise showed no benefit.

What helps: a sparkling wine stopper that clips under the lip and seals tightly, and keeping the bottle as cold as possible. Then sparkling wine stays pleasant for roughly one to three days.

Coravin and similar systems

With these systems a needle goes through the cork, wine is drawn off and replaced with argon, so the bottle is never actually opened. According to the manufacturer the wine keeps for months or even years, and the cork reseals itself afterwards. These are manufacturer claims; we found no independent confirmation for such long periods.

America’s Test Kitchen described wine from such a system as almost as fresh as new after a month. Wine Spectator reported needles clogging with crumbling cork and the remaining wine evolving faster the more you draw off. Such a system makes most sense for people who regularly drink single glasses from many different bottles with natural corks. Screwcaps need a separate accessory, and the gas capsules are an ongoing cost.

What matters when choosing accessories

Vacuum pump: preferably a simple manual pump with stoppers that sit firmly in the neck. A pump does not replace the fridge; it complements it.

Sparkling wine stopper: it has to hook or clamp under the lip so the pressure cannot push it out.

Small bottles: clean 250 or 375 millilitre glass bottles with screwcaps are inexpensive, and Wine Spectator also recommends decanting into them.

Inert gas and needle systems: only if you regularly have opened bottles over longer periods and accept the running costs.

When you need nothing at all

If the bottle will be finished within one or two days, the original closure and the fridge are enough. That applies all the more to screwcaps.

Some sweet and fortified wines keep longer once open than dry whites anyway. And with sparkling wine a spoon does nothing; a tight stopper and cold help.

Sources and review status

Research as of 30 October 2026. We have not tested any of the products mentioned ourselves. The keeping times are ranges from the sources linked below, not our own measurements.

We found no test by Stiftung Warentest, Konsument or Which? of wine stoppers or vacuum pumps. Information from manufacturers such as Coravin is labelled as manufacturer information in the text.