Bar Tools

Bottle Stopper

A bottle stopper is a reusable seal for an opened bottle: a silicone or rubber plug, a vacuum stopper worked by a hand pump, or a hinged clamp for sparkling wine. It slows an open bottle going stale; it does not stop it. In our experience it matters most for vermouth, sherry and fizz, the bottles in a home bar that fade once opened.

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The tool

About the Bottle Stopper

A Seal Slows Oxidation but Cannot Undo It

Once a bottle of wine is opened, air fills the gap at the top of the bottle, and the oxygen in that air slowly flattens the flavour. A stopper keeps more air from getting in, but the air already inside stays.

The fuller the bottle, the less air there is. That is why pouring the last third into a small clean bottle helps more than any stopper.

Vermouth Belongs in the Fridge

Vermouth is a wine with herbs and added spirit, usually around 15 to 18% ABV. In our experience that strength is not enough to protect it once opened, so it fades the way wine does.

Stoppered and cold, we keep it for about three or four weeks. A bottle forgotten in a warm cupboard for a season will flatten a Martini or a Negroni, whatever the gin.

How long an opened bottle keeps, stoppered and in the fridge (sherry by the Consejo Regulador’s guidance; the rest our guidance)

Fino or manzanilla sherry

Stopper: Plain plug
Keeps for about: Up to a week (Consejo Regulador)

Sweet or dry vermouth

Stopper: Plain plug
Keeps for about: Three or four weeks

Lillet and other aromatised wines

Stopper: Plain plug
Keeps for about: A month

Amontillado sherry, ruby or tawny port

Stopper: Plain plug
Keeps for about: Amontillado up to two months (Consejo Regulador); port several weeks, tawny up to about eight (ours)

Champagne or prosecco

Stopper: Hinged clamp
Keeps for about: One to three days

Spirits at 40% ABV

Stopper: Any, or the original cork
Keeps for about: Years

Bottle	Stopper	Keeps for about
Fino or manzanilla sherry	Plain plug	Up to a week (Consejo Regulador)
Sweet or dry vermouth	Plain plug	Three or four weeks
Lillet and other aromatised wines	Plain plug	A month
Amontillado sherry, ruby or tawny port	Plain plug	Amontillado up to two months (Consejo Regulador); port several weeks, tawny up to about eight (ours)
Champagne or prosecco	Hinged clamp	One to three days
Spirits at 40% ABV	Any, or the original cork	Years

Sparkling Wine Needs a Clamp

An opened bottle of champagne or prosecco is still under pressure, enough to push out a plug held in only by friction. A clamp stopper hooks under the lip of the bottle and holds against it.

Keep it in the fridge as well. Cold wine holds its dissolved carbon dioxide better than warm, and the fizz lasts longer.

Spirits Rarely Need One

In our experience a spirit at 40% ABV keeps for years once opened. What it occasionally needs is a replacement for a cork that has dried out and crumbled into the bottle.

Choose silicone over cork for a stopper you will reuse, and wash it between bottles. A stopper that has sat in sweet vermouth carries that flavour into the next one.

Using it

Using the Bottle Stopper

Usage

Resealing vermouth, sherry, port, wine and sparkling wine between uses, always with the bottle in the fridge. Also replacing a spirit's cork once it crumbles.

Pro Tip

Write the date you opened it on the back label of every vermouth and sherry. Once that date is older than the bottle's keeping time, taste it before it goes into a drink.

Professional Tips

We keep opened vermouth and sherry in the fridge with the stopper in.
Use a clamp stopper on sparkling wine. A plain plug can be pushed out.
Pour the last third of a bottle into a smaller clean bottle to cut the air left in it.
Wash the stopper between bottles so flavours do not carry across.

Alternatives

Budget Alternative

A plain silicone stopper and a place in the fridge. Together they do most of what a vacuum set does for vermouth and sherry.

Premium Option

A vacuum stopper with a hand pump for still wine, and a sturdy clamp for sparkling. Neither keeps a bottle fresh indefinitely.

Specifications

Material
Silicone or rubber over steel or plastic; sparkling stoppers add hinged metal clamps
Capacity
Fits most standard wine and spirit necks
Details
Three kinds: a plain plug, a vacuum stopper with a hand pump, and a hinged clamp for sparkling wine

Go further

More to explore

Common Questions

Do bottle stoppers keep wine fresh?

They slow it down. A stopper prevents spills and evaporation, but the air already in the bottle keeps reacting with the wine. Cold slows that reaction, so stopper the bottle and refrigerate it. Pouring it into a smaller bottle helps too, because there is less air.

How long does vermouth keep once opened?

Kept stoppered in the fridge, about three or four weeks before it tastes noticeably flat. At room temperature it fades within days. Vermouth is an aromatised wine at around 15 to 18% ABV, too weak to keep the way a spirit does.

Are champagne stoppers different?

Yes. Sparkling wine is still under pressure once opened, and that pushes a plain plug out. A sparkling stopper has hinged arms that clamp under the lip of the bottle. Clamped and in the fridge, an opened bottle keeps usable fizz for one to three days in our experience.

How long does sherry keep once opened?

Fino and manzanilla are the fragile ones: the Consejo Regulador, the sherry region’s governing body, gives an open bottle up to a week, tightly corked in the fridge, and other sherries such as amontillado up to two months. Tawny port about eight weeks is our guidance.

Do spirits need a stopper?

Not to stay fresh. In our experience a spirit at 40% ABV changes very slowly once opened, though a bottle left nearly empty for years can fade. A stopper on a spirit usually replaces a cork that has crumbled or snapped.

Do vacuum wine stoppers work?

For still wine, a little, for a few days. The pump draws out some of the air in the neck, which slows it going stale. Never use one on sparkling wine, which needs its pressure kept in, not air pulled out.

Does a spoon in the neck keep champagne fizzy?

A spoon makes no seal, so it cannot hold the pressure in. Use a clamp stopper and keep the bottle in the fridge. Cold wine holds its dissolved carbon dioxide better than warm wine, so the bubbles last longer.

Sources.

Checked between 18 October and 20 October 2026.

Consejo Regulador, sherry.wine, “Conservation and serving” (open bottle: fino and manzanilla up to a week, other wines up to two months, tightly corked in the fridge).
Vacu Vin, “Our story: the invention of the Original Wine Saver in 1986”.
America’s Test Kitchen, “Wine savers: equipment review” (testing publication: the Vacu Vin Original Wine Saver “did a good job at preserving opened bottles for a week”; the Coravin Pivot+ kept wine for weeks).

Make something

Made with the Bottle Stopper

Used In These Cocktails

Bamboo Boulevardier Americano Gin & It Rossini Buck’s Fizz

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Guide by Jerry Can Spirits · Updated 20 October 2026

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