Contigo AUTOSEAL&reg; Sport Stainless Steel Travel Mug 2 pack Blue / Green 2 16-ounce stainless steel travel Thermos for both cold and hot beverages Patented AUTOSEAL lid automatically seals between sips to ensure no spills Vacuum-insulated technology keeps beverages hot for 4 hours, and cold for 12 hours Rubberized Bottom uniform body makes this travel mug easy to hold. Fits most standard car cup holders, Hand washing recommended; lid is top Rack "dishwasher safe"