304 Stainless Steel interior 201 Stainless Steel exterior; 24 oz. (709 mL) Double wall vacuum insulated bottle with powder coated finish; Polypropylene Plastic screw-on lid with handle; 24 oz. (709 mL) Double wall vacuum insulated bottle with powder coated finish; Polypropylene Plastic screw-on lid with handle; Hand wash only; Do not microwave Do not place in freezer; Designed for use with both hot and cold beverages; Will keep liquids hot for 8 hours, cold for 18 hours; Includes Core 365Æ engraved logo in base of each bottle; Product Size: 11″ h x 3″ dia.;