The Reflect 27oz water bottle is made of three materials: sustainably harvested bamboo, stainless steel and food-grade silicone.. No paint. No plastic. Just a deliberate design that embodies our mission to change the way that people think and drink.. Single wall design is lightweight and perfect for everyday hydration.. 18/8 Stainless Steel construction.. No paint, ink, coatings, or plastic.. Electropolished interior, a safe & non-toxic process, and rounded corners make it easy to clean.. Includes the leak proof Bamboo Cap to create all stainless interior.. Compatible with all Classic Caps, including the spill proof Sport Cap 3.0.. Dishwasher safe, hand washing recommended for Bamboo Cap.. Backed by the lifetime Strong as Steel guarantee.. Capacity 27 fluid ounces (800 ml). Weight (w/bamboo cap) 8.6 ounces (243.7 g). Size (w/bamboo cap) 9.9\" H x 2.9\" W (251.8 mm H x 72.5 mm W). Opening Diameter 1.75\" (44 mm)