FIG. 1 is a front view of a toothbrush showing our new design;

FIG. 2 is a right side view of the toothbrush shown in FIG. 1, the left side being a mirror image thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view of an alternate embodiment of the toothbrush design with the views being shaded to show a contrast in color;

FIG. 5 is a right side view of the toothbrush shown in FIG. 4, the left side being a mirror image thereof; and,

FIG. 6 is a rear view of the toothbrush shown in FIG. 4.

Thr portions of the top and bottom surfaces neither shown in the drawing nor described in the specification, form no part of the claimed design.