PRESTO CHANGO! Smoothly switch from a bottle to a sippy cup with the NURSH Transitional Sippy Lid. Designed to fit perfectly on NURSH bottles, the silicone spout turns your existing NURSH bottle into a sippy cup. Made with 100% silicone, these tops are dishwasher and sterilizer safe, so keeping them clean is a snap. It’s like magic, but without all the smoke and mirrors.