The Krypton Sports Bottle is attached with an anti-slip soft protective silicone handle, which helps to prevent dents, scratches, and other imperfections on your bottle. Give your water bottles a longer life. And when you have sweat or water on your hands, you won’t slip off when you take the gallon water bottle to drink. This protective boot is made of high-quality BPA-FREE silicone, Safe for all ages. The flip-top lid is designed with a secure lock to make it dust and leak-proof.