This vacuum insulated travel mug is constructed from high quality double wall stainless steel. The mugs vacuum seal ensures that your beverage will stay piping hot for over 5 hours, or icy cold for over 10! A screw-tight, flip-top lid provides easy drinking access while protecting you from spills and leakage. The cup fits most automobile cupholders, so whether in the office, on the road or travelling, this tumbler will be an awesome companion.