This is one of those frustrating "I know I've seen it before, but cannot for the life of me find the reference for it" pieces. It's painfully familiar, but nowhere to be found in the more obvious places.
It feels very Finnish, although it was purchased in Denmark. It's a very thick and dark steel-blue glass, and comes in at a whopping 395mm tall, inclusive of stopper. Polished and chamfered rim, moulded base.
Any help gratefully received.