FIG. 1 is a top left front perspective view of a mop bucket showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a left side elevational view thereof; the right side elevational view being a mirror image;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top left front perspective view of a mop bucket shown with the environmental unclaimed features removed;

FIG. 8 is a top plan view of FIG. 7;

FIG. 9 is a rear elevational view of FIG. 7;

FIG. 10 is a front elevational view of FIG. 7;

FIG. 11 is a left side elevational view of FIG. 7; the right side elevational view being a mirror image; and,

FIG. 12 is a bottom plan view of FIG. 7.

The broken line portions of FIGS. 1 through 7 are for illustrative purposes only and form no part of the claimed design.