Perfect for young toddlers graduating from sippy cups, this tumbler makes hydration fun. The tumbler has double-wall insulation, so drinks stay cold for longer (up to 10 hours!), and condensation will not form on the outside of the tumbler to create messy water rings. Leak-proof straw won’t drip when tipped Prevent messes and spills with a straw tumbler that will not leak-the attached straw has a valve that allows easy access to water but will not drip when the tumbler is tipped over. The straw is also made from antimicrobial materials, to help prevent the spread of germs. Food-grade, antimicrobial construction The screw-on lid fits securely, and everything is made of durable stainless steel and silicone, which are food-grade quality and BPA-free. Fun Disney designs your kids will love These 2-packs include two designs from Disney favorites like Disney Princesses, Star Wars Mandalorian and Marvel’s Spider-Man. How does the leak-proof straw work? The straw is made of flexible silicone, with a valve built in that opens and allows water to easily flow while your child is sipping. But when the cup is tipped over, the silicone valve and the screw-on lid prevent water from spilling out. The straw is also removable for hand washing.