Why Does Champagne Have a Wire Cage? The History of the Muselet

Champagne bottles have a wire cage because pressure from carbon dioxide inside the bottle can push the cork out. The wire cage, called a muselet, holds the cork securely in place until the bottle is ready to be opened. Its design developed over time as Champagne producers looked for a reliable way to seal sparkling wine.

The muselet is part of a closure system that includes a cork and a small metal disc. The disc helps spread pressure over the cork, while the wires secure the cork beneath the bottle’s neck ring. The same practical device has also become a recognizable part of Champagne presentation and collecting.

Key Takeaways

• A Champagne wire cage is called a muselet, from a French word associated with muzzling.

• The muselet holds the cork down against pressure from carbon dioxide in the bottle.

• Adolphe Jacquesson’s 1844 patent concerned a protective metal plate used with the cork’s ties.

• The modern muselet combines a wire ring, a four-legged cage, and a metal plaque.

• Keep the bottle pointed away from people and control the cork when opening it.

Why Does Champagne Have a Wire Cage?

A Champagne bottle has a wire cage to help keep its cork in place under pressure. The pressure develops during the bottle’s second fermentation, when yeast converts sugar into alcohol and carbon dioxide. Because the bottle is sealed, much of that carbon dioxide remains dissolved in the wine and creates pressure inside the glass.

At around 20°C, Champagne pressure is typically about 5–6 bar, or roughly 73–87 pounds per square inch. That pressure is enough to push a poorly secured cork out of the bottle. The cork seals the neck, while the muselet provides a mechanical restraint that helps keep the cork in place during storage, shipping, and handling.

The word muselet is related to the French museler, meaning “to muzzle.” The name suits its function: the wire structure holds the cork down over the bottle opening.

What Is a Muselet Made Of?

A muselet is a small assembly made up of a wire belt, a wire cage, and a metal plaque. These parts work together over the cork and around the neck of the bottle.

The wire belt

The lower wire belt fits beneath the raised ring around the bottle’s neck. That ring provides an anchor for the muselet, helping keep the cage secured over the cork.

The wire cage

The cage has four wire legs joined at the top. The legs pass over the cork and connect to the belt, distributing the restraining force around the bottle opening.

The plaque

The plaque is the round metal disc that sits on top of the cork, beneath the cage. It helps prevent the wire from cutting into the cork and spreads force across its surface. Many plaques are printed, embossed, or coloured with a Champagne producer’s name or design.

The terms muselet and plaque de muselet refer to different parts: the muselet is the wire assembly, while the plaque is its small metal disc. The disc is also commonly called a Champagne capsule.

How Did the Muselet Develop?

Before wire cages became common, Champagne corks were held in place with ties made from string, hemp, or wire. Some early closures used wooden plugs wrapped in oiled hemp and sealed with wax. Cork became a useful stopper because it could compress into a bottle neck and then expand to form a tight seal, but it still needed to be restrained.

The challenge was not only keeping the cork in place. Under pressure, a thin tie could dig into the cork, weakening the closure or allowing gas and liquid to escape. Producers needed a way to hold the cork securely without concentrating the force on a narrow line.

Adolphe Jacquesson’s 1844 patent

In 1844, Champagne merchant Adolphe Jacquesson filed a patent for a method that placed a metal plate between the cork and its ties. The plate helped distribute pressure and kept the string or wire from cutting into the cork.

This detail is often shortened into the claim that Jacquesson “invented the muselet” in its present form. More precisely, his 1844 patent addressed the protective metal plate used with the bottle’s cork and ties. The wire cage developed through later innovations in bottle closure and application.

From ties and agrafes to the wire cage

During the 19th century, producers used different methods to secure corks, including wire bindings and metal fasteners known as agrafes. Preformed wire restraints gradually made the process more consistent and easier to apply. Mechanical equipment for applying muselets followed, helping Champagne houses secure bottles more efficiently.

The transition was gradual. Traditional ties and newer wire closures were used alongside one another for a time, as Champagne makers adapted their production methods.

The Madame Clicquot corset story

A popular story says Madame Clicquot removed a wire from her corset to secure a Champagne cork. It makes a memorable tale, but it is an anecdote rather than well-established evidence of who invented the muselet. The documented history points to several stages of development, including Jacquesson’s patent for the metal plate and the later spread of preformed wire cages.

How Does the Muselet Work?

The cork, plaque, cage, and bottle neck each play a different part in the closure:

1. The cork fills and seals the bottle opening.

2. The plaque sits between the cork and the wire cage, spreading the force over the cork.

3. The four wire legs hold the cork down.

4. The wire belt catches beneath the raised ring around the bottle’s neck.

This arrangement holds the cork in place while allowing a person to remove the restraint when opening the bottle. The cage is usually secured by twisting a short length of wire at the base. Once the wire has been loosened, the cork still needs to be held firmly because pressure remains inside the bottle.

What Is the Metal Disc on a Champagne Cork?

The metal disc is called a plaque de muselet or Champagne capsule. It sits directly over the cork and beneath the wire cage. Its original practical purpose is to protect the cork from the wire and help distribute the force holding it down.

Over time, the plaque also became a place for Champagne houses to display their names and designs. Early plaques were primarily functional, while printed and branded versions made each producer’s bottle easier to identify. Pol Roger’s 1906 vintage plaques are noted as an early example of plaques produced as a collectible series.

Why Do People Collect Champagne Plaques?

Collecting Champagne plaques is known as placomusophily. Collectors look for plaques from particular producers, vintages, regions, and design series. Some seek rare or unusual examples, while others build collections around a favourite house or visual theme.

A plaque’s design may identify the producer or commemorate a particular edition. To keep one in good condition, collectors generally separate it carefully from the wire assembly and avoid bending or scratching its surface. The producer’s name and the plaque’s artwork can help with identification.

From Muselet to Sabering

The muselet keeps the cork secure until it is time to open the bottle. At California Champagne Sabers, we celebrate the moment of opening through Champagne sabering, turning a bottle’s history and craftsmanship into part of the experience. Whether you admire the plaque, collect it, or watch a bottle being sabered, each detail adds to the ritual of Champagne.

Frequently Asked Questions

Does every sparkling wine use a muselet?

No. Many sparkling wines use a muselet, but closure styles vary by producer and bottle format. Some sparkling wines use other closures or packaging, depending on the product and how it is made.

Can you reuse a Champagne muselet after opening?

A removed muselet is not designed to reseal a bottle. Use a stopper made for sparkling wine if you want to close and refrigerate an unfinished bottle.

Why does a Champagne cork have a mushroom shape?

The cork is compressed to fit inside the bottle neck. After removal, its lower part expands while the portion that sat outside the neck remains narrower, giving it the familiar mushroom shape.

Can the muselet affect the taste of Champagne?

The muselet’s job is to secure the closure. It is not an ingredient and does not directly add flavour to the wine. The cork and seal affect how the wine is protected during aging.

Are Champagne muselets recyclable?

The wire and metal plaque are made from materials that may be recyclable, but local recycling rules differ. Separate the components only if your local collection service accepts them in that form.

How can I identify the producer on a Champagne plaque?

Look for a name, initials, logo, or other printed design on the plaque. If it has no clear marking, compare its artwork and shape with a Champagne plaque catalogue or collection guide.