Features: This bottom cover is made of food-grade silicone, soft, flexible and durable. Slip-proof silicone boot quiets clanking when setting down your bottle and also adds grip on slippery outdoor surfaces. Provide protection for bottle, provide your bottle from bumps and dents. The non-slip soft silicone secures your bottle from being knocked down by accident. It makes your bottle stay safe. The proper elasticity of this cup boot makes it very easy to put on and take off. Just put the bottle bottom cover on the table, and gently press the cup to put it on the bottom. Specifications: Material: Silicone Color: Light purple,light pink,light blue,gray,black,white,pink,blue,dark blue Size: A/B/C/D/E/F: 7.5*4.5cm G/H/I/J/K/L: 9*4.5cm Package contains:1pc Bottle Sleeve Boot Note: Please allow slight dimension difference due to different manual measurement. Please note that slight color difference should be acceptable due to the light and screen.