Kid Kanteen Stainless Steel Water Bottle, 12-Ounce (Brushed Stainless / Sky Diver) Comes with Spill Proof Sport Cap 3.0 made of BPA-free Polypropylene #5 and Food-grade Silicone, cap will resist spills when spout in the closed position,<span class="a-text-bold">cap is not leak proof</span> Durable and High Quality Food Grade 18/8 Stainless Steel Construction Large 1.75 inch (44 millimeter) opening fits ice, easy to fill and pour; Compatible with all Klean Kanteen Classic caps, including the Leak Proof Loop Cap Easy to clean electropolished interior doesn&#039;t retain or impart flavors Backed by the Klean Kanteen Lifetime Strong as Steel Mineral Red Winter Plum Wild Orchid Sea Crest Coastal Waters