The First Years Insulated Sippy Cups make cleaning easier for mom! Moms love the one piece lid that features an easy clean valve system. Unlike many other cups, the lid is easy to clean and there are no small parts to lose at daycare or go down the garbage disposal. Not to mention, the cups are dishwasher safe and BPA free! To make life even easier, all of The First Years Insulated Cups have interchangeable lids! This means you can keep the cup even when your child has grown out of a sippy cup spout! The cup can be used with The First Years Straw and Grown-up Cup lids. With Magical Color Change Technology, 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 cup is designed to be easy for children to hold and the double wall insulation prevents the cup from sweating.