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

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a first side elevational view;

FIG. 5 is a second side elevational view;

FIG. 6 is a top plan view; and,

FIG. 7 is a bottom plan view.

The broken line structure is for illustrative purposes only and forms no part of the claimed design.