Silicone Cork Stopper Seals air-tight to preserve opened wine and champagne bottles. Highly durable & flexible, will remove painlessly. Dishwasher safe for easy cleaning. Bottle stopper is excellent for resealing bottles of wine, sparkling wine, beer, soda, juice, soft drinks, water and more. When resealing sparkling beverages, please note that the silicone bottle stoppers work best on half-full bottles stored in the fridge.