1、NON SLIP PROTECTION: Silicone bumper boot 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, fit perfectly on the bottom of the cup and doesn't fall off easily 3、SAFE SILICONE: The protective water bottle bottom sleeve is made of food grade silicone, soft, flexible, BPA free, odorless, reusable and durable, suitable for dishwasher 4、EASY TO CLEAN BY HAND: Before using the space cup bottom cover, clean the bottom with a damp cloth and allow to dry. Then slowly place the lower lid on the bottle and squeeze the air 5、THOUGHTFUL GIFT: Bottom cover is suitable for seniors, adults and children. The perfect accessory for a space cup and water bottle is also a top choice for holiday gifts