The First Years Slim Line 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 Slim LIne 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. An ideal choice for mealtime drinking!