1. NON-SLIP PROTECTION: The silicone protective sleeve can solve the problem of dented and unstable bottom of the kettle, and effectively protect the bottom of the bottle from dents, scratches, non-slip and noise. 2. FLEXIBLE AND ADJUSTABLE: The bottom sleeve is made to fit the exact size of the space cup, easy to adjust, fits perfectly to the bottom of the cup and is not easy to fall off 3、SAFE SILICONE: The water bottle protective bottom sleeve is made of food grade silicone, soft, flexible, BPA free, odorless, reusable and durable, dishwasher safe 4. EASY TO CLEAN BY HAND: Before using the space cup bottom cover, please wipe the bottom with a damp cloth and let it dry. Then slowly put the bottom cover on the bottle and squeeze out the air. 5. THOUGHTFUL GIFT: The bottom cover is suitable for seniors, adults and children. The perfect accessory for a space mug and water bottle is also the best choice for Christmas gifts.