I claim the ornamental design for the shot glass, substantially as shown and described.
FIG. 1 is a top front perspective view of a shot glass showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front elevational view thereof, the rear being identical; and,
FIG. 5 is a left side elevational view thereof, the right side being identical.
The evenly dashed broken lines of the various embodiments of the shot glass are directed to environment and are for illustrative purposes only; the evenly dashed broken lines form no part of the claimed design.