Looks to be mid century modern and Blenko-esque, the closest design seems to be 5616, but the bottom seems too wide and I don't know if Blenko's have a ridge at the opening like this one? It also looks a bit Scandinavian like a Gullaskruf Arthur Percy I've seen. But

It is 19.5 inches tall. Here are three images:
full size
the opening to show it is not level and has a bottle type ridge
the bottom to show its pontil mark
Any help in identifying it is great appreciated!