This sleek and sturdy coffee mug is made out of high quality food grade 18/8 stainless steel that will not rust or break. Whether you are camping in the great outdoors or at the office, your mug will always have a fresh, clean taste that would never retain or transfer flavors. The mugs handle is specially designed for your hands comfort. So they are easy to travel with and fits nicely in most vehicle cup holders, backpacks, and carry on bags.