Made from high-grade, durable silicone material. Perfect replacement for your bottle lid sealing ring when worn out or when elasticity is lost. Silicone material, durable and not aging, safe for the health of your families. Stretchy silicone makes it easy to fix on the cover of your bottle or thermal cup. Features -Color:Black -Material:Silicone -Size: 6.50X6.50X0.50cm/2.55X2.55X0.20in -Note:Suitable for Capacity of 20Oz. -The silicone ring is flexible and can your bottle lid well, you can install it easily. -Enough to meet your daily needs and replacements, or you can share them with your friends, family, and others who need them -Replacement sealing ring for bottle, sealed leak proof heat insulation, can be used for a long time. -Adoption high-grade silicone material, which is durable and practical for daily use. -With good elasticity, this silicone ring has good elastic and flexible, much practical. Package list: 5 x Sealing Rings