The ornamental design for a dispenserreservoir, as shown and described.
FIG. 1 is a perspective view of a dispenser reservoir of an embodiment of the new design;
FIG. 2 is a front elevational view of the dispenser reservoir of the embodiment illustrated in FIG. 1;
FIG. 3 is a left elevational view of the dispenser reservoir of the embodiment illustrated in FIG. 1;
FIG. 4 is a right elevational view of the dispenser reservoir of the embodiment illustrated in FIG. 1;
FIG. 5 is a rear elevational view of the dispenser reservoir of the embodiment illustrated in FIG. 1;
FIG. 6 is a top plan view of the dispenser reservoir of the embodiment illustrated in FIG. 1; and,
FIG. 7 is a bottom plan view of the dispenser reservoir of the embodiment illustrated in FIG. 1.
The portions of the Figures shown in broken lines are not part of the claimed design and are for illustration only. The broken line(s) which define the bounds of the claimed design form no part thereof.