The ornamental design for a cupdispenser, as shown and described.
FIG. 1 is a perspective view of a cup dispenser showing a new design; FIG.
2 is a front elevational view thereof; FIG. 3 is a right elevational view
thereof, the left side being a mirror image thereof; FIG. 4 is a rear
elevational view thereof; and, FIG. 5 is a top plan view thereof.