PERFECT FIT - Size 12-24oz fits the Hydroo 12-24 oz water bottles, Stanle Quencher H2.0 40oz 30oz 20oz, and Stanle IceFlow Flip 30oz 20oz Straw Tumbler. （Fits bottom diameter 2.8-2.95 inch cup Tumblers). MAXIMUM PROTECTION - Durable silicone Flex Boot protect your bottle against unexpected scratches, dents or dings during outdoor adventures, extend the life of your bottle. High-Quality silicone - Premium silicone rubber, without BPA. It not only as a bottle protect boot but also be used as a Pet Bowl. CUSTOMIZE YOUR BOTTLE - That bottom boot various color schemes on their bottles. Mix and match to make your bottle fit you.⚠️ Note: Please measure the width of the bottom of the bottle before purchase (To avoid size purchase error). 100% LIFETIME SERVICE: Any quality issues we will try our best to give you a satisfactory solution. Try them out for yourself completely without risk . boot