What is the function of the muselet in a Champagne bottle?

• A. The muselet secures the cork against pressure to prevent ejection
• B. It seals the bottle mouth
• C. It adds sugar to the dosage
• D. It changes the color of the wine

Answer: (A)

The function being tested is the way a muselet protects you from a dangerous pop by securing the cork under pressure. Champagne bottles contain dissolved CO2 at high pressure, so the cork is pressed tightly into the neck and would be pushed out if not restrained. The muselet is the wire cage placed over the cork and tightened to lock the cork in place, distributing the pressure and preventing it from ejecting when the bottle is opened or handled. It helps keep the cork safely contained, not to seal the bottle—that job belongs to the cork itself—and it doesn’t affect sweetness or color.