Stainless Steel, Polypropylene plastic; 21 oz. (621 mL); Double-wall vacuum insulated bottle with powder-coated finish; Features lid with hook that screws on and off for easy drinking; Designed for use with both hot and cold beverages: Keeps contents hot 12 hours and cold 30 hours; Wide top opening for adding ice cubes; Hand-wash only; Do not microwave, do not place in freezer; CO2 laser engraving not available on Silver color; Product Size: 10.5 h x 2.75 dia.