American 4-4-0 Travel Mug Pictures a 4-4-0 locomotive running through a prairie fire. This travel mug combines the excellent insulating and water proof properties of neoprene wetsuit material and the convenience of a stainless steel travel mug. The permanent soft touch cover is naturally water and stain proof. It eliminates condensation and sweating and fits in most car cup holders. Use for both hot and cold drinks.