The ornamental design for a pencilcup, as shown and described.
FIG. 1 is a front perspective view of a pencil cup showing the new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back thereof;
FIG. 4 is a right side thereof;
FIG. 5 is a left view thereof;
FIG. 6 is a top thereof;
FIG. 7 is a bottom thereof; and,
FIG. 8 is a front perspective view thereof showing the swing out drawer in its open configuration.
The surfaces shown in broken lines in the drawings are included for the purpose of showing portions of the pencil cup that form no part of the claimed design.