Make sipping fun and mess-free with Theoni Kids Stainless Steel Insulated Tumbler. This 355ml tumbler keeps drinks cold for hours and includes both a soft silicone straw and a durable stainless steel straw with a star-shaped stopper to prevent slipping. Its spill-resistant lid minimizes mess, making it ideal for school, daycare, travel, and play. Crafted from 304-grade stainless steel and free from BPA, lead, and phthalates, it’s safe, sturdy, and built to last. The lid is dishwasher safe and the cup is easy to hand wash.