Nuby 3 Piece Boy No-Spill Cup with Flex Straw, 10 Ounce When drinking, the Touch Flo straw valve requires a squeeze and suck action to allow the liquid to flow,, the valve enables the no-spill feature. The Touch Flo valve in the silicone straw opens when child applies pressure and sips through the straw. The soft silicone straw is gentle on tender gums and emerging teeth; the silicone straw is clear and easy to clean. The contoured base of the cup is easy for little hands to hold When drinking, the Touch Flo straw valve requires a squeeze and suck action to allow the liquid to flow,, the valve enables the no-spill feature. The Touch Flo valve in the silicone straw opens when child applies pressure and sips through the straw. The soft silicone straw is gentle on tender gums and emerging teeth; the silicone straw is clear and easy to clean. The contoured base of the cup is easy for little hands to hold When drinking, the Touch Flo straw valve requires a squeeze and suck action to allow the liquid to flow,, the valve enables the no-spill feature. The Touch Flo valve in the silicone straw opens when child applies pressure and sips through the straw. The soft silicone straw is gentle on tender gums and emerging teeth; the silicone straw is clear and easy to clean. The contoured base of the cup is easy for little hands to hold When drinking, the Touch Flo straw valve requires a squeeze and suck action to allow the liquid to flow,, the valve enables the no-spill feature. The Touch Flo valve in the silicone straw opens when child applies pressure and sips through the straw. The soft silicone straw is gentle on tender gums and emerging teeth; the silicone straw is clear and easy to clean. The contoured base of the cup is easy for little hands to hold