stoppers are using glass and silicone material, safe and strong, and can be used for a long time. They can provide an airtight seal to extend and preserve the opened to a good taste. The is essential for bachelor parties, picnics or drinks. Features - Color: Transparent -Material:Glass, silicone - Size: 3.30X3.30X2.90cm/1.30X1.30X1.14in - Diameter of the plug part:18.5mm - Easy to use, simply insert the into or beer bottles to preserve the original flavor of the . - With these stoppers, open bottles of , beer can stay fresh for several days without leaking. - With multiple advantages, such as tasteless, reusable. A good helper for managing the open . - Helps easily keep beer and drinks fresh. The material is safe, healthy and reliable. It is a necessary at home. - With many stoppers design, you can share them with your friends or family, much decorative. Package list: 12 x stoppers