Enjoy an early morning, warm cup of joe while waiting for the fish to bite. This mug is composed of cold rolled steel and coated with a rugged, durable enamel. The steel is lightweight and nearly unbreakable making the it great for hiking, traveling, camping, and more. You can toss the mug in your bag or back pack without having to worry abou it breaking. The rugged enamel prevents the mug from getting too hot but will keep any beverage warm and toasty in the coldest of nights. Because of rolled steel and enamel coating, the mug is hand wash only to preserve the unique coating and long-lasting durability.