The ornamental design for a beverage stave, as shown and described.
FIG. 1 is an isometric view from a first, side perspective of a beverage stave;
FIG. 2 is a first side view of the beverage stave shown in FIG. 1;
FIG. 3 is a second side view of the beverage stave shown in FIG. 1;
FIG. 4 is a third side view of the beverage stave shown in FIG. 1;
FIG. 5 is a fourth side view of the beverage stave shown in FIG. 1;
FIG. 6 is a top plan view of the beverage stave shown in FIG. 1; and,
FIG. 7 is a bottom plan view of the beverage stave shown in FIG. 1.
The broke lines shown in the figures are for the purposes of illustrating portions of the beverage stave that form no part of the claimed design. The beverage stave is shown with symbolic breaks in the middle. The appearance of any portion of the article beyond the break lines form no part of the claimed design.