An unusual piece of vintage barware, this is a heavy, sham shot glass made by the Hazel Atlas company. The exterior is the size of a normal shotglass, but it holds far less due to its heavy walls and bottom. Glasses like this were often used by bartenders when someone offered to buy them a drink, so they could keep the customer happy and remain sober while working.
It's 2.25" tall and 1.875" at the top. It holds half an ounce.
The lower part is paneled, the top smooth. It's machine-made, likely dating between the 1930s and 1950s.
Mark: "HA" mold mark in center of bottom.
Item ID: 3760