Wine bottle stoppers provide an air-tight seal to prolong and preserve opened bottles of wine. Perfect Addition to your Wine Arsenal. Made of high quality 100% food grade silicone, won't rust, crack or fade. Don't afraid of corking the wine and leaving bits and pieces of it in the bottle. Our stoppers are perfect for sealing wine, champagne, soda, oil and vinegar bottles. They fit snugly into any size bottle, sealing the liquid inside.