The ornamental design for a beverageholder, as shown.
FIG. 1 is a perspective view of the beverage holder;
FIG. 2 is a top elevation view of the beverage holder showing means for receiving, holding, retaining or otherwise grasping a beverage-containing vessel;
FIG. 3 is a bottom elevation view of the beverage holder;
FIG. 4 is a side view of the beverage holder;
FIG. 5 is a side view of the beverage holder;
FIG. 6 is a rear view of the beverage holder showing means for receiving the hand of a user; and,