FIG. 1 is a side elevational view of a toothbrush showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an end elevational view thereof;

FIG. 5 is an elevational view taken from the opposite end thereof.

The broken line disclosure of the bristles in FIGS. 1, 2, 4 and 5 is for illustrative purposes only and forms no part of the claimed design.