Klean Kanteen Kid Kanteen Classic Sport Single Wall Stainless Steel Kids Water Bottle with Sport Cap 3.0 Sugar Plum Durable and High Quality Food Grade 18/8 Stainless Steel Construction Comes with Sport Cap 3.0 made of BPA-free Polypropylene #5 and Food-grade Silicone Large 1.75 inch (44 millimeter) opening fits ice, easy to fill and pour; Compatible with all Klean Kanteen Classic caps Easy to clean electropolished interior doesn't retain or impart flavors Backed by the Klean Kanteen Strong as Steel Guarantee