The OXO Tot Transitions 360⁰ Leakproof Cup is designed to help little ones move from the sippy cup stage to the big kid cup stage. The Cup is designed to mimic open cups, allowing little ones to drink from any side, while the leakproof valve that only opens while tots are sipping helps prevent big spills or splashes. The valve is also see-through to let little ones see liquid while they drink to learn how far to tip the cup. The soft, non-slip collar makes it easy for kids to hold, while the flared lip of the cup makes it comfortable for them to sip from. The crystal-clear cup and convenient measurement markings shows how much liquid is left, which is great for little ones learning, but also great for adults to know how much went into the cup, and when it's time to refill. The cup rim and the valve are also easily removable for thorough cleaning. All bodies and lids in the OXO Tot Transitions line are interchangeable. These 360⁰ Leakproof Cups come in packs of two (in brand new colors!) and are BPA free, PVC free, phthalate free, and dishwasher safe. For tots 6 months and up.