Our double-walled, vacuum-sealed, stainless steel cups are designed to be portable, durable and convenient. They’re made of 18/8 stainless steel – the highest quality steel used for food preparation, giving the cup a lifetime of durability. The double walled design keeps drinks ice cold or steaming hot from the first sip to the last, while keeping your hands dry and free of frostbite or being burnt. The powder coated finish provides a sure grip even when your hands are sweaty.