304 Stainless Steel interior/201 Stainless Steel exterior with powder coating, PP Plastic screw-on lid;16.9oz(500 mL) double wall vacuum insulated powder coated bottle and duo f; Duo function lid unscrews in 2 spots – lower seal provides wide opening to insert ice cubes, upper seal is designed for standard use on the go; Vacuum insulation helps keep your hot beverages warm longer and cold beverages cool longer than bottles and tumblers without vacuum insulation; Designed for use with both hot and cold liquids; Hand-wash only; Product Size: 8" h x 3.125" dia.;