Spill-Proof Design: Unique straw with a spill-proof valve that opens and closes automatically Easy Cleaning: Tumblers are detachable for thorough cleaning & top-rack dishwasher-safe Convenient: Allows for easy one-handed drinking 2-Pack: Set includes two 14 oz. fun-themed tumblers Comfortable: Ideal for toddlers and older kids (3 and up) Safe: Free from Styrene, Formaldehyde, Octamethylcyclotetrasiloxane Flexible: Perfect for both indoor and outdoor use