Silver and sleek, this stainless steel insulated tumbler will quench your thirst and your need for a stylish on-the-go option for your beverage of choice. But be carefulÑeven though it looks cool, it keeps your hot beverages really, really hot! Hand wash with care. Not microwave safe. Double wall insulation Food-grade stainless steel Keeps iced drinks cold for 24 hours Keeps hot drinks hot over 2.5 hours Lid secures against spills with gratifying closure.