A Prime Line® Exclusive!** 16.9 oz (500 mL) double wall vacuum insulated powder coated bottle and duo function lid. 304 Stainless Steel interior/201 Stainless Steel exterior with powder coating, PP Plastic screw-on lid. 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.