Thanks to the Contigo Spill-Proof Kids Tumbler with Straw, 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? This 14 oz. tumbler fits most car cup holders. Rest assured, all materials are 100% BPA-free. At the end of a long day of fun and games, you'll be happy to know that body, lid, and straw are dishwasher safe on the top rack and the straw twists apart for easy cleaning.