This flat bottom tumbler in the Bellflower pattern was originally made by the Sandwich Glass Company circa 1860, and by McKee in later years. Since this is not the heaviest flint, I suspect the later production version. This is the single vine, fine rib version of this popular flint pattern.
Size: Approximately 3 1/2" high, 3 1/4" top diameter
Condition: Very good. A few minute nicks to ribbing. No chips, cracks or repairs.
Note that I try to be conservative about condition descriptions, carefully noting any flaws. Of course, with antique items, there will be some signs of usage, and/or manufacturing defects. But overall, my customers have always been pleasantly surprised upon receiving their items, and of course, returns are no problem if I happen to miss anything.