Make your Hydro Flask your own with a colorful, durable silicone Flex Boot. Customize your look and protect against bumps and dings. . . . Small boot fits 12-24 oz. wide and standard mouth bottles. . Removable, silicone boot adds extra protection to your Hydro Flask. . BPA-free. . Lifetime warranty. . Imported. . 817318022590 32670800013 BBS