The ornamental design for a beverageholder, as shown and described.
FIG. 1 is a perspective view of a beverage holder showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The inside of the beverage holder, below the top lined portion and the bottom lined portion, is non-ornamental and does not form a part of the new design. The portions shown in broken lines are for illustrative purposes only, and form no part of the claimed design.