After our old WMF Champagne bottle sealer has done faithful service for 15 years before the rubber stopper has given up the ghost, the choice fell again on a product of WMF. This sparkling wine bottle stopper is light, small and pleasantly easy to use. Simples application of the closure, a slight pressure to fix the plug - and the bottle is sealed. The sparkling wine is so sparkling as just uncorked two days after opening yet. Recommended.