Not Insulated Single Wall Construction - Best for ambient temperature beverages Ultra Lightweight & Leak Proof - Small enough to fit in a handbag or satchel Quality Materials - 18/8 food-grade stainless steel, does not retain or impart flavors, powder coated finish Easy Clean & Dishwasher Safe (max 130°F cycle) - Wide mouth design ensures it is easy to clean BPA & Phthalate Free - No plastic touches contents