FIG. 1 is a perspective view of mugs;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a left side elevation view;
FIG. 5 is a rear side elevation view;
FIG. 6 is a rear right side elevation view;
FIG. 7 is a front side elevation view; and,
FIG. 8 is an environmental perspective view.
The broken line portions of the disclosure are for illustrative purposes only and form no part of the claimed design.