Nuby knows little ones are animated and active, even while holding (or sometimes dropping) their drinks. Nuby's Flip-It Active Stainless Steel Water Canteen offers a leak-proof flip top, so parents don't have to worry about spills and leaks! The press button flip-top keeps the straw clean and locks when not in use. This canteen features a durable, stainless steel base with fun prints your child will love. The stainless steel canteen base is insulated, keeping liquids cool while also keeping furniture protected from condensation. The Flip-It Active Stainless Steel Water Canteen is designed with a Soft Flex Silicone straw that is gentle on your child's teeth and gums. Whether your child sits still while sipping, or frequently knocks over and holds their cup at an angle, Nuby has you covered.