Easy for little hands to grip and sip. No. 1 spill-proof cup. 100% spill-proof, leak-proof, break-proof guarantee. Twist 'n click leak-proof seal. Bisphenol-A free. BPA free. With the new Twist 'n click cup feature, simply twist lid on cup until you hear and feel the lid click closed, then you'll know the cup is 100% leak-proof. Designed for baby. Designed with a child development expert to easily grip and sip. Straw helps promote mature mouth movements. Narrow waist at top allows for more control in sipping. Easy to drink from because lid and cup are always aligned. Designed for mom. No-roll square shaped bottom fits in most cup holders. Slider on lid closes to keep straw clean. Child-proof straw cannot be removed from top of cup. Durable cup is 100% break-proof. Lid is interchangeable with all Playtex cups. All parts are dishwasher safe. Patented spill-proof valve eliminates messes and is easy to clean. Made in China.