Klean Kanteen 40 oz Stainless Steel Water Bottle with 2 Caps (Stainless Unibody Bamboo Cap and Sport Cap 3.0 in Bright Green) BPA-free & eco-friendly with reformulated spout is now 6x stronger Made of 18/8, food-grade stainless steel, no liner needed Doesn't retain or impart flavors Slim design fits in most cup holders Includes 2 Caps: Sport Cap 3.0 in Bright Green and Stainless Unibody Bamboo Cap