What a thing! This really fun "bottoms up" shot glass was made by McKee in the early 1930s, apparently first introduced in speak easy's, and in addition to being great just as is, it also glows in black light!  While some later reproductions of these were made, this is an original, distinguished by a patent mark and detailed face and hands of the nude draped over top (or bottom!)

3 3/8" t x 2 5/8" wide; 2 5/16" across at lip. Very good condition, no chips or cracks. There are a few tiny dark spots on the literal "bottom", minor.