FIG. 1 is a perspective view of a sponge, showing a first embodiment of my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a right-side elevational view thereof, the left-side elevational view being a mirror image thereof;
FIG. 5 is a top plan view thereof, the bottom plan view being a mirror image thereof;
FIG. 6 is a perspective view of a second embodiment thereof;
FIG. 7 is a front elevational view of FIG. 6;
FIG. 8 is a perspective view of a third embodiment thereof;
FIG. 9 is a front elevational view of FIG. 8;
FIG. 10 is a perspective view of a forth embodiment thereof;
FIG. 11 is a front elevational view of FIG. 10;
FIG. 12 is a perspective view of a fifth embodiment thereof;
FIG. 13 is a front elevational view of FIG. 12.
FIG. 14 is a perspective view of a sixth embodiment thereof; and,
FIG. 15 is a front elevational view of FIG. 14.
The broken lines showing a sponge container in FIG. 1 depict environmental matter and form no part of the claimed design. It is understood that the respective top plan views, bottom plan views, left-side elevational views, right-side elevational views, and rear elevational views of all embodiments are identical.