Nuby's Thirsty Kids Flip-It Reflex cup is great for travel and on-the-go sipping. Nuby has designed the Flip-It Reflex cup with a soft silicone spout that is gentle on children's teeth and gums. The push button top keeps the cup sealed shut, even if little hands knock it over. When shut, the top tucks out of the way, protecting the spout while it's not in use. The cup base is made of BPA-free materials and features a silicone band that allows for an easy grip for little hands. With available replacement kits for the silicone spout and straw, parents can have a backup while cleaning. The replacement kit for the spout and straw enable parents to enjoy the longevity that Nuby products provide their family.