Keep contents hot up to 4 hours and cold up to 16 hours. Made with certified 90% post-consumer recycled steel. Impact-resistant base cap provides added durability and protection. Award-winning Climate Lock vacuum insulation keeps drinks hot or cold for hours. Splash-proof Flip Lid. Thin rim for comfortable drinking. Sweat proof construction protects surfaces. Chip-resistant Klean Coat finish. BPA free. Wide stable base. Ergonomic grip handle. Dishwasher safe. Material: 18/8 food-grade Stainless Steel. Opening Diameter: 3.54" (90mm). Size: 4.1"x3.73" (104.1x94.7mm). Weight: 360g. Manufacturer: Klean Kanteen. Manufacturer's number: K14RMFL-IB.