I was looking for something else and stumbled onto a image of a vicke lindstrand teardrop vase, It had a spiral of bubbles elevating towards the stem. The top of the vase was spilt.
I have this piece in my collection and which is very similar to website one with out the split in the top. I just wonder if it is a Kosta one because there is no marking or labels.
I am being thick! here are the measurements 10" high and 2.1/5" wide narrowing to 1" opening in about 25mm. It weights an impressive 500 grammes.