The ornamental design for a cupretainer, as shown and described.
FIG. 1 is a top perspective view of a cup retainer showing our new design;
FIG. 2 is a front elevational view thereof; (rear view, left view and right view are omitted since they are identical with the front view);
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a bottom perspective view thereof;
FIG. 6 is a cross-sectional view thereof, taken along line “VI-VI” of FIG. 3;
FIG. 7 is a cross-sectional view of a box with the cup retainer of our new design; and,
FIG. 8 shows a cross-sectional view of the box of FIG. 7 holding a cup on the cup retainer.
The dash-dot-dot lines in the drawings define the boundary of claim and form no part of the claimed design. The dashed lines depict environment that forms no part of the claimed design.