When considering champagne bottle components, which one is primarily responsible for maintaining seal while under pressure?

• A. The cork
• B. The muselet
• C. The bottle glass
• D. The capsule

Answer: (A)

The cork is the primary seal because its natural elasticity and compressibility let it snugly press into the neck when the bottle is under pressure. As CO2 builds up inside, the cork is driven into the mouth of the bottle and expands to fill any gaps, creating a tight barrier that slows gas escape. The wire muselet’s job is to hold the cork in place and prevent it from being expelled, not to seal. The bottle glass simply contains the pressure and provides strength, while the foil capsule protects the cork and adds tamper resistance. So the cork is the key element that actually maintains the seal under pressure.