Thanks to the Contigo Kids Spill-Proof Plastic Tumbler with Straw Honeydew, 14 fl oz. children as young as 3 can easily transition from sippy cups to a big-kid tumbler. No need to worry about messy spills, even if your toddler holds this well-designed, brightly patterned tumbler upside down. Our innovative engineers put a leak-proof silicone seal around the straw opening and a spill-proof valve on the inside. For good measure, they added a soft-grip bottom pad to the tumbler to minimize skids and tipping. Road trip? Rest assured, all materials are 100% BPA-free. At the end of a long day of fun and games, youll be happy to know that body, lid, and straw are dishwasher safe on the top rack and the straw twists apart for easy cleaning.