Nuby active sipeez insulated flip it designed for drinking on the go the touch flo valve opens when pressure is applied this is so liquids pass through the straw only when your child sips the no spill soft straw is gentle on tender gums and emerging teeth and is recommended by a paediatric dentist the easy to use flip top cap keeps the straw hygienic and clean r r r r the insulated double wall traps air between the layers helping to keep drinks cooler for longer and your little one ca