WOW! Thanks to the Nûby™ valveless, leak resistant spout, your baby will find the transition from bottle to cup easier than ever. Since it is made from the same safe, soft silicone material as Nûby™ nipples, your child is comfortable with the feel and function of these No-Spill™ spouts. While the unique contour shape easily fits their small hands, the spout is still gentle on your child's tender gums and emerging teeth. There are a variety of fun bright colors to choose from!