Nuby's Flip-It Hard Straw Cup is great for everyday use, as well as staying hydrated while on-the-go. The Flip-It Hard Straw Cup's flip-top is designed to help prevent spills and leaks. With a bite-proof hard straw that conveniently tucks away and the Vari-Flo valve system that allows liquid to pass through the straw only when your child sips, the Flip-It Hard Straw Cup is built for everyday adventures at home, school, or on the go. The cup also features an Easy Grip, ergonomic design that makes it easier for little hands to grasp and hold. Available in bright colors, the Flip-It Hard Straw Cup adds fun to every sip while giving parents confidence in a durable design made for active kids.