What is this?The bottle cap provides an airtight seal so that no smell, dust can get into the bottle you open. Widely used in beer bottles, wine bottles, champagne bottles, soda bottles, seasoning bottles, etc.What will I get?Material: SiliconeColor: OrangeHole Inner Diameter: 26mm/1.02";Height: 27mm/1.06";Cap Diameter: 37mm/1.46";Thickness: 2.6mm/0.1";Stopper Diameter: 32mm/1.26";Package Contents: 5 x Bottle CapAre there any advantages of the product?The stopper is made of silicone material, which has good flexibility, lightweight, and is not easy to break and deform. It has a good tightness to keep your drink fresh. Moreover, the stopper can be washed with water and be reused.How to use it?Easy to use, just put the cap on the mouth of the bottle; the cap can be pulled out by pulling the edge.What should  I notice?Please confirm the required size and color before purchase, and install it in the right place.