Great for at home and on-the-go! Nuby has designed the Flip N’ Sip cup with a pressure-sensitive Touch-Flo valve to help prevent drips and spills. The Touch-Flo valve opens when children sip from the cup. When not sipping from the straw, the valve closes, ensuring a leak-resistant cup. The cup's Flip-it top tucks the silicone straw out of the way when closed, keeping it clean. Parents can have confidence this product will last, because the cup base is made of durable, break-resistant materials. Stay spill-free and easily take the Flip N’ Sip cup on your everyday adventures!