Safety Material: Food-grade bottle caps, silicone and stainless steel material, reusable and durable, safe and healthy. Easy to use: Simply slides the wine stopper into the top of your wine or liquor bottle. No more fighting with corks. Scope of delivery: 1 black bottle cap + 1 white bottle cap + 1 red bottle cap + 1 yellow bottle cap. Dishwasher safe and reusable: The champagne bottle stopper can be reused as often as you like. You can also clean the bottle cap by simply rinsing it with cold water and drying it naturally Multifunction: Wine bottle stoppers create an airtight seal to extend and preserve opened bottles of wine. Carbonation. Airtight hygienic seal keeps your wine fresh and insects stay out. Note: The data are all measured manually. Please allow an error of 1-3cm. Due to the difference between light and display, there is a certain color difference, which depends on the actual object received