The water bottle bottom sleeve can perfectly fit the cup bottom and won't fall off easily. And it features contrast color and shock absorption. This tumbler silicone boot can protect your water bottle bottom from collision, scratches, and will not make a noise when placing it on the table. It is constructed of silicone material. The diameter of the bottle bottom sleeve is 7.5cm, and the total height is 4.5cm. It is perfect for school, work, running, hiking, biking, camping, traveling, etc. Item Name: Bottle Bottom Sleeve Material: Silicone Features: Non-Slip Design, Contrast Color, Wide Compatibility Size Details: Diameter: 7.5cm/2.95" (Approx.) Height: 4.5cm/1.77" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bottle Bottom Sleeve