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The Sippy Cup’s valve is designed to be easy for liquid to flow when your little one is drinking, but is sealed tight when the cup is tipped, making it leakproof when it needs to be. The unique twist-in valve is easy to install and stays secure, even when the Cup is dropped (or thrown!). The Set also includes a Training Lid to mimic grown-up cups, and when your big kid is ready, the disk can be removed to be used as an open cup.
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