This is a really interesitng mug that I have no idea about the maker. The mug and the font of the words on it reminded me of something from the 50s, but I still don’t know whether it is new or not. There are no markings on the bottom of the mug at all. It’s a strange shape with a very sharp angled handle. It is mostly just a brownish glaze and the mug is rather heavy duty – like restaurant china. The words “Kup-O-Ko” are in raised letters on the side – I assume that’s short for “Cup of Coffee”?