The ornamental design for a beverage holder, as shown and described.
FIG. 1 shows a front, top perspective view of a beverage holder incorporating the present invention.
FIG. 2 shows a top view of the beverage holder of FIG. 1.
FIG. 3 shows a bottom view of the beverage holder of FIG. 1.
FIG. 4 shows a side view of the beverage holder of FIG. 1, the other sides being identical thereto; and,
FIG. 5 shows a front, top perspective view of the beverage holder of FIG. 1, the broken lines are for illustrative purposes only and form no part of the claimed design.