Durable and Safe - The interior is made of stainless steel, non corrosive and durable, and the exterior is made of food grade silicone (the same material as baby nipples). The dual function design allows the plug to be comfortably and reliably installed in almost any bottle, providing perfect sealing. Easy to use and clean - Our wine stoppers are ergonomically designed, tapered, easy to insert and remove, and have no hassle. It is also easy to store when not in use. (PS: You can put these in the dishwasher to clean!) Widespread application - Our stoppers are designed for almost any size of wine and other bottles (even olive oil and vinegar bottles), and come with airtight seals to extend and preserve the bottles or beverages you open. Colorful plugs - available in four colors (red, blue, deep blue, and purple). Whether for daily use or special occasions, our eye-catching colors can be used to match your event theme and add joy and brightness to your bottle. This product is an excellent gift for any wine enthusiast, you can give them as gifts or leave them at home for the next gathering.