1.【SMALL BOOT】- Size: 2.9 x 1.65 inches (D x H); Compatible with 12oz 18oz 24oz Hydro Flask, 18oz 24oz Thermoflask, 14 18 22oz IRON FLASK, 13oz Contigo, 20oz RITC, 12oz 18oz 24oz Vmini, Stanley Adventure Quencher 20oz 30oz 40oz and Stanley IceFlow 20oz 30oz Tumbler, Simple Modern 30oz 40oz Tumbler. Fit for most vacuum bottles with 2.9'' bottom diameter. NOT COMPATIBLE: Hydro Flask trail series 12-24oz. 2.【WELL PROTECT】- Our silicone bottle bottom boot snugly fits bottle bottom and is not easy to slip off. Help to protect your beautiful bottles against dings, dents, scratching and damage. Also keeps the noise down, quieter when setting down the bottle on table surface. Provide a longer life for your metal water bottle. 3.【BPA FREE】- BPA-FREE silicone, safe for all ages. Made of super soft and stretchy silicone material, our water bottle boot can be taken off and washed after using for a period of time. Durable, reusable, guaranteed to NEVER come loose! Easy to take it on and off. Fit for all sports and outdoor activities. Good for school, work, picnic, hiking, camping, yoga and so on. 4.【PORTABLE TO CARRY】- Reusable, washable and foldable. Our sleeve can withstand stretching, folding, and anything life throws at it. Easy to Install and Remove, Our clear silicone cup sleeve for Stanley cup with proper elasticity for a secure fit. Available in a variety of colors and sold in sets of two for personal use or sharing with family and friends. 5.【NEW APPEARANCE DESIG】 - Classic rhomboid texture, 3D texture upgrade the anti-collision protection function, and feel better. It's the nice stainless steel water bottle accessory for your active, on-the-go lifestyle. Suitable for all sport and outdoor activities.