FIG. 1 is a top right side perspective view of a mug showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof, the right side elevational view being a mirror image thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top right side perspective view of a second embodiment thereof;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is a front elevational view thereof;

FIG. 10 is a left side elevational view thereof, the right side elevational view being a mirror image thereof;

FIG. 11 is a top plan view thereof; and,

FIG. 12 is a bottom plan view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design.