This practical bottle silicone bottom boot is especially designed for your outdoor activities or bottle protection. The silicone sleeve protects your cup from bumping, scraping, and doesn't make noise when placed on the table! Give you more convenience to use your bottles. Features -Color:Grey -Material:Silicone -Size:9.00X9.00X4.50cm/3.54X3.54X1.77in -Note:Fits 32oz-40oz cups with 3.5inch diameter. -The bottle boot is easy to use, which can protect your bottle in daily life, giving you a wonderful using experience. -A warm gift selection for your family members, girlfriend, boyfriend, etc., they will like this gift. -You can easily put it on or off the bottle, proper size and lightweight is easy for you to carry and store. -This water bottle boot is light, portable and necessity for your loved water bottle bottom protection. -Bottom silicone sleeve will greatly extend the service life of your water bottle and greatly reduce the collision sound. Package list: 2 x silicone water bottle cover