I purchased this at an antique shop in America. There's no marking on the bottom, but the shape suggests it might be a Glasbake mug (sorry if I'm wrong). It seems to be free of cracks, chips, and noticeable stains. However, there are a few points of concern, so please carefully examine the condition in photos 6, 7, 8, 9, and 10. Taking the above points into consideration, please purchase only if you are satisfied and understand that this is a vintage item. Considering the condition of the handle, I think it would be better to use this item as a decorative piece rather than for everyday use.