Product Description: Size: 3.8 cm. Color: Black. Material: Silicone. Package includes: 6. Safe. Stoppers keep wine fresh: These stoppers preserve wine in a can, protecting it from dust and oxidation, keeping it fresh and flavorful until the next use, even up to 14 days! The bottle caps are silicone-based, so they fit different types of bottles and can also be used to seal beer bottles. Optimal Material: Made from high-quality silicone material to prevent oxidation, these edible rubber wine stoppers provide an airtight, universal fit for all types of wine bottles! They come equipped with a rubber stopper. Durable and long-lasting, they provide an airtight seal, keeping your wine fresh. The rubber stopper's simple design effectively keeps air out of the bottle. Application: This wine vacuum stopper set is ideal for red or white wine, olive oil, truffle oil, or other liquids, but not for sparkling wine. Convenience: These caps are proven to prevent leaks or spills when installed, are reusable, and are easy to hand wash. PERFECT GIFT: Give our wine vacuum stopper as an impressive gift to your friends, family or colleagues, any red or white wine lover, and enjoy!