The Classic 27oz is our original stainless steel water bottle designed for kids and adults with easy hydration in mind. Single wall design is lightweight and easy to bring anywhere. Klean Coat powder coat finish is 4X more durable, chip-resistant and safe for people and planet. NOTE: Sport Cap is NOT leakproof. The flask has a 18/8 Stainless Steel construction with a Klean Coat powder coat finish which is 4X more durable than Klean Kanteen's previous finish and formulated for human and environmental health (Brushed Stainless has no coating). There is an electropolished interior, which is a safe & non-toxic process, and rounded corners make it easy to clean and it includes a spill proof, high flow Sport Cap 3.0. Cap. The flask is compatible with all Classic Caps, including the leak proof Loop Cap & plastic-free Bamboo Cap and it's BPA free and dishwasher safe. This product is backed by the Strong as Steel guarantee from Klean Kanteen. Capacity 27 fluid ounces (800 ml) Weight (w/loop cap) 7.2 ounces (204 g) Weight (w/sport cap) 7.5 ounces (212.6 g) Size (w/loop cap) 10.6" H x 2.9" W (269.9 mm H x 72.5 mm W) Size (w/sport cap) 10.9" H x 2.9" W (276.2 mm H x 72.5 mm W) Opening Diameter 1.75" (44 mm) Child Safety Warning: Sport Cap 3.0 not intended for children 3 and under. Not intended for chewing or teething. Always use this product with adult supervision. Always ensure the silicone valves are properly installed. Adult assembly required.