Thanks to the Contigo THERMALOCK Spill-Proof Kids Stainless Steel Tumbler with Straw, children over 3 can sip out of a cup like the big kids. No need to worry about messes, even if your toddler holds this well-designed tumbler upside down. Our innovative engineers put a leak-proof silicone seal around the straw opening on the lid and a spill-proof valve inside the straw. For good measure, they added a soft-grip bottom pad to minimize skids and tipping. The THERMALOCK double-walled vacuum insulation keeps drinks cold up to 10 hours and helps prevent condensation, even after hours of fun at a summer picnic. Road trip? The 12-ounce tumbler fits most car cup holders. Rest assured, all materials are 100% BPA-free. After a full day at the playground, 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.