20 Oz (600 Ml) Double-wall Vacuum Thermal Insulated Bottle with Bamboo Lid. Features 304 Stainless Steel Metal Exterior & 304 Stainless Steel Metal Lining. Screw on & Off Bamboo Lid. Hand-wash Only. Do Not Microwave. Do Not Place in Freezer. Vacuum Insulation Helps Keep Your Beverages Hot or Cold Longer Than Traditional Insulation. Designed for Use with Both Hot & Cold Beverages. Caution. Item May Leak If Tipped or Held Upside-down.