The ornamental design for a blenderbase, as shown and described.
FIG. 1 is a front/top perspective view of a blender base, showing our new design;
FIG. 2 is a front view of the blender base of FIG. 1.
FIG. 3 is a rear view of the blender base of FIG. 1.
FIG. 4 is a left side view of the blender base of FIG. 1.
FIG. 5 is a right side view of the blender base of FIG. 1.
FIG. 6 is a bottom view of the blender base of FIG. 1; and,
FIG. 7 is a top view of the blender base of FIG. 1.
The broken lines in the drawings and the areas within depict portions of the blender base that form no part of the claimed design.
The blender base is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.