18/8 rust-free stainless steel construction with powder-coated matte finish. Double-wall insulated, wide-mouth lid that is 100% BPA-free ABS plastic with twist-top spout and a carrying handle on the lid made of zinc alloy for strength and durability. Copper-lined to keep beverages hot for up to 10 hours and cold up to 20 hours. Condensation-free surface. Hand wash only. BPA certified.