Features: [NO LEAKS & AIRTIGHT]: This is a great idea for the storage of fermented liquids or kitchen sauces. Friendly reusable swing stoppers work with clear glass bottles as containers to keep your beer fresh; Full seal gasket for better carbonation reservation. [WIDELY USED]: Suitable for beer bottles, wine bottles, and other solid bottles that have 1 INCH bottle neck O.D. ( THE MOST OF BEER BOTTLES WILL DO) and there is a circle of bulges which is 0.7 inches below the bottle mouth, the circle of bulges below the mouth would help to Fix the clip of our swing bottle caps. The best tool to reserve your homebrew, beer, wine, whiskey, liquor, soda, juice, olive oil, vinegar, sauces, and other liquids. [DURABLE MATERIAL & EASY CARRY]: Food safe silicone + stainless steel + ABS plastic, Simple and classic practical design. Our swing top caps are made of safe durable premium material, you do not need to worry about rust or break. And what's more? there is an exquisitely designed little ring on the cap, which helps you carry more bottles of beer with just one hand! [Package Include]: 12 * Swing Top Bottle Cap 12 * Extra Gasket Durable Material: The frame of this swing top cap is made of stainless steel, the red gasket is made of food safe silicone, and the white plug is made of safe and sturdy ABS plastic. These little flip tops would be the best tool for your homebrew! Our flip top stoppers are made of premium materials, daily use of open & close, install & remove will not cause any scratch on these swing top caps (classic style) Fit For Bottle Neck O.D. 1 inch: If your bottle's neck OD is about 1 inch and has a circle of bulges about 0.7 inches below the opening, our AIR TIGHT seal swing cap would be a perfect fit for you! Our swing-top bottle caps feature strong locking, durable long life, nice looking, glossy finish, and well-made craft No Leak & Double Service Life: Our swing caps have a very tight seal and there would be no liquid leaks. At the same time, we have 12 pcs extra gasket in the package. The red silicone gasket is removable, reusable, and can be replaced in seconds, this will help extend the service life of these swing caps Easy To Open & Close: Open--Catching the edge of the stainless steel hasp, push it up, and then the plug will automatically bounce up. Seal--Align the white plug with the bottle mouth, push the stainless steel hasp down, and then the plug will be tightly locked on the bottle mouth Perfect for Homebrew: High-quality swing cap is mostly used for bottles with carbonated beverages, such as beer, kombucha, soda, and so on. Easy to use, Easy to clean, reusable hundreds of times, sealed to keep fresh, isn't it great? Come and get a great way of keeping your homebrew fresh