20 oz (600 mL) double-wall vacuum insulated bottle with Bamboo lid. Features 201 Stainless Steel exterior and 304 Stainless Steel 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 and cold beverages. Caution: Item may leak if tipped or held upside-down.