This Thermos ThermoCafe 2010 Travel Mug has double wall foam insulation which will retain hot and cold temperatures with ease. It features a spill resistant slide lock lid so you will not even lose a drop of drink if it gets knocked over. You can also drink through the lid. This flask will fit most vehicle cup holders and has a convenient handle making it easier for you to travel with. The mug is dishwasher safe and has a plastic liner for easy cleaning.