Vintage Blown Glass Vase? of Sorts

Here I am again with a piece of glass I don't know anything about (I've mentioned before, I don't buy glass often, but I'm trying). I found it at a thrift shop and it caught my eye because of the bubbles in the glass, and the fact that the stem appears to have been added on after the top portion.

It's a very thin glass, and feels fragile to the touch -- makes me pretty nervous, actually.

It stands 8" tall and is 2 1/8" wide at the base.

I'm mostly interested in the process of making this piece, and, on the off-chance, the maker if anyone knows of that.