Great for Beer.Double wall vacuum insulated.Keeps both hot and cold drinks at the ideal temperature for longer time, though cup lid is designed with a wide mouth for convenient drinking.Double vacuum insulating layer ensures no condensation on the outer wall. No coaster is needed.Keeps drinks cold while not cold on the outer wall.Safe to touch when holding hot drinks.Equipped with metal bottle opener removable from the cup lid to make life easier when need to open bottle drinks whether you are at home, the workplace or outdoor. Made of 18/8 food grade stainless steel. Resistant to corrosion and