Concept
Muselet
The four-wire metal cage holding the cork on a Champagne bottle. Invented in 1844 by Adolphe Jacquesson to prevent cork ejection under high internal pressure.
What it is
The muselet is the four-wire metal cage (three vertical, one horizontal) holding the cork on a Champagne bottle. Function: to resist the internal pressure of ~6 bars that prise de mousse leaves behind. Without it the cork would shoot out as soon as the bottle is stored or transported.
On top of the cork sits a plaque de muselet (cap-plate): a round metal disc with the producer’s logo or branding. Collectors actively gather them; rare examples from old prestige cuvées fetch hundreds of euros at auction.
History
Before 1844 Champagne bottles were sealed with cork plus twine or leather. Problem: storing in warmer rooms drove pressure beyond what the twine could hold, with cork-explosions as a result. Adolphe Jacquesson (Champagne Jacquesson) designed the wire cage in 1844 as a solution.
The invention spread rapidly through Champagne and then to méthode-traditionnelle wines worldwide. The muselet hasn’t changed materially since: four wires, four turns to fix the cork.
How to open one
Standard procedure:
- Remove the foil cover over the muselet
- Keep one hand on the cork (essential safety detail)
- Turn the muselet eyelet six half-turns counter-clockwise to release the cage
- Hold the cork, turn the bottle (not the cork)
- Let the cork escape slowly with a soft sigh, not a bang
A bottle that bangs signals poor technique, not festive cheer. With proper technique you hear a soft “pop” and keep the cork in your hand.
Frequently asked questions
How many turns does a muselet have exactly?
Four wires, six half-turns to release. That’s a fixed international standard, set by the Comité Champagne. Some other sparkling wine regions use four or five half-turns, but most follow the Champagne spec.
Can I collect the plaques?
Yes, this is an established wine hobby (capsulism). Plaques from prestige cuvées, old vintages or limited releases are collector’s items. Specialist fairs run in Reims and Épernay, mostly in October.
Why doesn’t all sparkling wine have a muselet?
Cheaper tank-fermentation wines with lower internal pressure (3-4 bars) sometimes use a crown cap or a simple agraffe. Méthode-traditionnelle wines at 5-6 bars of pressure always require a muselet or comparable wire cage for safety.