Avoid cleaning up messy spills and leaks! Kids are animated and active even while holding (and occasionally dropping) their drinks. The Nuby Cool Sipper Soft Spout Sippy Cup is here to help parents stop worrying about spills and leaks! Each trainer cup is designed with a soft silicone spout that helps prevent drips and spills while being gentle on gums and emerging teeth. Additionally the silicone spout is designed to aid in the transition to open-cup drinking. The Cool Sipper is insulated to keep liquids fresh and cool and help protect furniture from a sweating cup. For extra security the cup spout has a pressure-sensitive Vari-Flo valve that helps regulate fluid intake as children drink. When sipping stops the valve closes for a leak-resistant cup. The ergonomic shape ensures a comfortable secure grasp for small hands. Whether your little one is at home in the car or on the go they can stay happy and hydrated without ever leaving behind their favorite cup!