Brand name for a French company of the ALCAN Packaging Capsules in collaboration with the Champagne house Duval-Leroy developed Champagne stopper was introduced in mid 2009, the public. Alcan is also the inventor and manufacturer of the famous brand screw cap STELVIN . The closure consists of a capsule with Bottle Cap with integrated bar to open. Since, therefore, not a conventional cork is used, thus the problem of the dreaded is Corked excluded. Opening a Champagne Bottle is so much easier and quicker than a conventional lock....You see a shortened form of description. The full description is reserved for our subscribers.