NAYAD® Roamer 40 oz Stainless Double-wall Bottle is made of 18/304 rust-free stainless steel construction with powder-coated finish, double-wall insulated bottle. Copper-lined to keep beverage hot for up to 10 hours and cold for up to 20 hours. Bottle comes with wide-mouth screw on lid that has a built-in stainless steel carrying handle made of zinc alloy for strength and durability. Hand wash only. FDA certified.