- Function: These silicone bottle caps keep beer fresh after opening by sealing leaks and preserving carbonation. Soft and flexible, they help prevent spills and are a practical gift for beer lovers and for any bottled drink. - Package contents: 18 beer silicone rubber bottle covers in 6 colors (3 green, 3 yellow, 3 purple, 3 blue, 3 red, 3 orange). - High quality: Food-grade silicone, soft and durable, non-toxic. - Suitable size and compatibility: Outer diameter 1.18 in (3 cm), height 0.43 in (1.1 cm), inner diameter 0.94 in (2.4 cm). Fits most standard beer bottles and some larger models. Note: Our cover is much smaller than the normal cover size (about 0.8 inch inner diameter). - Use and washing care: Easy to use, to put on and take off, close the lid, and store. Dishwasher safe, reusable, and easy to clean. - Use scenarios: After opening beer to maintain fizz and prevent leaks; storing bottled drinks in the fridge; ideal for travel, picnics, camping, and as a thoughtful gift for beer enthusiasts.