The Classic 18oz (532ml) is our original stainless steel water bottle designed for kids and adults with easy hydration in mind. Single wall design is lightweight, small and easy to bring anywhere. Klean Coat powder coat finish is durable, chip-resistant and safe for people and planet. The 18oz size features a narrow profile for easier gripping, packing and carrying. 18/8 Stainless Steel construction. Klean Coat powder coat finish is 4X more durable than our previous finish and formulated for human and environmental health (Brushed Stainless has no coating). Electropolished interior, a safe & non-toxic process, and rounded corners make it easy to clean. Includes spill proof, high flow Sport Cap 3.0. Cap is not designed to be leakproof. Compatible with all Classic Caps, including the leak proof Loop Cap & plastic-free Bamboo Cap. Backed by the lifetime Strong as Steel guarantee. Capacity 18 fluid ounces (532 ml) Weight 6.5 ounces (185.4 g) Size 8.9" H x 2.9" W (225.6 mm x 72.9 mm) Opening Diameter 1.75" (44 mm) About Klean Kanteen Klean Kanteen is a family-owned company on a mission. Today, they not only create the highest quality reusable products on the planet, but work hard to bring benefit to the people and places they touch—and do everything they can to keep single-use waste from trashing the world.