How to Cork a Wine Bottle After You Open It

Push the cork back in dry end first, twisting gently as you go. The end that sat in the wine has swollen and will not fit, but the drier top end usually will. For anything you plan to keep more than a day or two, a vacuum or silicone stopper seals an open bottle better than the original cork does.

Why the cork will not go back in

The seal starts out as a squeeze. A bottling line takes a cork around 24 mm across, compresses it by roughly a third, and drives it into a neck bored to 18.5 mm, a width fixed by the EN 12726 bottle standard. For as long as the bottle stays closed, that cork is held under pressure.

Pull it out and it rebounds, though not evenly. The end that sat against the wine is damp and swollen, while the drier end nearer the capsule gives a little more. Within a minute you are holding something wider than the hole it came out of, which is why corks so often go back in more easily upside down.

Which end goes back in

Both answers have a case, so pick the one that suits the bottle.

The tidy argument says the wine-stained end should go back, because the other end sat under the capsule where dust and the occasional speck of mold collect. The practical argument says that end no longer fits, and forcing a swollen cork through a narrow neck crumbles it into the wine.

For a bottle you will finish in a few days, put the dry end in and wipe both the cork and the bottle mouth first. That handles the hygiene worry without the wrestling match.

The method that works

1. Wipe the bottle mouth and both ends of the cork with a clean cloth.
2. Hold the cork square to the neck, dry end down. A cork going in at an angle will tear.
3. Press and twist at the same time, slowly. Ramming it straight down is what snaps corks.
4. Stop while a little of the cork is still showing. Flush with the glass is not the goal.
5. Stand the bottle in the fridge, reds included.

When a cork is the wrong tool

Closure	What it gives you	Best for
The original cork	A loose seal, air still gets in	Finishing the bottle tomorrow
Silicone or rubber stopper	A tight, reusable seal	Most half-finished bottles
Vacuum pump stopper	Pulls some of the air out first	Stretching a bottle over 3 to 5 days
Sparkling wine stopper	Clamps on and holds pressure	Champagne, Prosecco, Cava
Screw cap	Retighten and you are done	Any bottle that came with one

A cork was built to hold a seal for years under compression, which makes it oddly bad at the one job people ask of it at home. A few dollars of stopper beats it. Screw caps skip the problem altogether, one of several reasons the closure says less about quality than most people assume.

Is the bottle worth resealing

Resealing buys time. It does not tell you whether the wine is worth keeping. Some bottles taste better on the second night, because a few hours of air soften the tannins in the same way decanting does in an hour. Others peak in the first glass and fade from there. Which one you are holding comes down to the grape, the age, and the style, and so does how long the open bottle will last.

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Frequently asked questions

Can you put a cork back in a wine bottle?

Yes, though rarely all the way. Push the drier end in first, twisting gently rather than forcing it straight down, and stop while a little of the cork is still showing. The cork expanded the moment it left the bottle, so it will never sit as deep as it did originally. That is fine for a bottle you plan to finish within a few days.

Which end of the cork goes back into the bottle?

The dry end is the practical choice, because the end that sat against the wine has swollen and usually will not fit. Wipe the cork and the bottle mouth first, since the dry end has been sitting under the capsule where dust collects. For a bottle you are finishing this week, that wipe settles the hygiene question.

Can you recork a bottle of Champagne or Prosecco?

Not with its own cork. A sparkling cork mushrooms out once the cage comes off and will not go back through the neck. Sparkling wine also sits at roughly five to six atmospheres of pressure, which a pushed-in cork cannot hold. Use a clamped sparkling stopper, which grips the lip of the bottle and keeps the bubbles for a day or two.