Double-sided Shampoo Brush

FIG. 1 is a top perspective view of a double-sided shampoo brush 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, a right side view being a mirror image of the left side view;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a bottom perspective view thereof.

The broken lines depict portions of the double-sided shampoo brush that form no part of the claimed design.