This stainless steel thermal insulated coffee mug is designed for both hot and cold drinks. It features a wide mouth, round and delicate design, and is easy to clean. The mug has a detachable straw and a concave-convex structure at the bottom that prevents it from collapsing. The internal and external layers are made of 304 and 201 stainless steel, respectively, providing insulation and cold locking. The mug is available in various colors, including white, silver, pink, yellow, black, and blue.