My SoftFlex™ silicone Spout with TouchFlo™ valve makes it super easy to drink and it's kind to baby's gums and emerging teeth.The No-Spill™ GripN'Sip™ is uniquely engineered with Easy Grip™ handles that are sized to fit your child's grasp. Engineered to make feeding and handling easier, designed with two people in mind, the No-Spill™ Cup is perfect for beginners. Your little one will find the transition from bottle to cup an easy one with the cup's soft silicone spout and the unique contour shape that easily fits their small hands. You will be delighted with the transition thanks to Nûby valveless, leak resistant design.Spout: The soft silicone spout is uniquely designed to prevent drips and spills while being delicate and gentle to baby's gums and emerging teeth. The pressure sensitive Touch-Flo™ feature regulates fluid intake with sucking action of child. When sucking action ceases, the spout closes, ensuring a leak resistant cup.