Leak-proof and vacuum-insulated thermos mug. The Sigg Thermo drinking mug is the ideal companion for all leisure activities, school, or the office. It impresses with its discreet design in a modern black finish. Thanks to its premium double-wall insulation, the travel coffee mug is suitable for both cold and hot beverages, keeping them warm or cold for hours. Additionally, the practical screw cap is guaranteed to be leak-proof thanks to the safety button, allowing liquid to only escape after the button is pressed. Made from high-quality 18/8 stainless steel, the thermos mug is odor-neutral, recyclable, and durable, with hand washing recommended for a longer lifespan. The thermos cup is made from food-safe materials and contains no harmful substances, including phthalates or estrogen-active substances.