The silicone protective base is designed to fit comfortably at the bottom of the stainless steel water bottle, providing durable protection against bumps, scratches, and everyday wear. Made from high-quality, food-grade silicone, it absorbs shocks and prevents loud noises when placing the bottle on hard surfaces. It is compatible with all Adventurer Water Bottles. It does not fit DOZZE Kids, Cruiser, and Voyager bottles, nor DOZZE tumblers or those of other brands.