Ease Your Little One s Transition to Open-Cup Sipping The Nuby First Training Cup is here to help beginners practice open-cup sipping for the first time. Made with soft silicone this unisex trainer spoutless sippy cup is gentle on gums and teeth while being safe for both warm drinks and cold drinks. This sipping cup for babies helps strengthen oral motor skills and the Easy-Grip design makes the cup easy for small hands to grasp and hold. The cup is angled so there is a steady flow of liquid for natural and safe sips and the weighted bottom of the cup helps stabilize your child s grip making it easier for them to succeed with open-cup drinking.