The ornamental design for a beveragecup, as shown and described.
FIG. 1 is a front view of a beverage cup showing my new design;
FIG. 2 is a rear view thereof;
FIG. 3 is a left side view thereof, a right side view being a mirror image;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof; and,
FIG. 6 is a top and front side perspective view thereof.
The broken lines in the drawing views represent unclaimed portions of a beverage cup, which are included for the purpose of illustrating unclaimed environment only and form no part of the claimed design.