he First Years Grown Up Trainer Cups with Magical Color Change are a hit with moms and kids! The Grown Up Trainer Cup allows your child to progress to the feel of an open cup, and keeps mom feeling good as the cup is still spill-proof! Mom's love the easy clean valve system that is built into the lid.
Kids have fun watching the color magically change when a drink is poured into it, while Mom has the peace of mind knowing when the drink reaches room temperature. The lid is just like mom or dad's on-the-go coffee cups!