FIG. 1 is a top, front, and right side perspective view of a liquid reservoir for installation in a dispensing unit showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a top, front, and right side perspective view of a second embodiment of a liquid reservoir for installation in a dispensing unit showing my new design;

FIG. 8 is a left side elevational view thereof;

FIG. 9 is a top plan view thereof;

FIG. 10 is a front elevational view thereof;

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

FIG. 12 is a rear elevational view thereof.