FIG. 1 is a front left bottom perspective view of a bath pen showing my new design in a first embodiment;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The left, right, and rear elevational views are identical to the front elevational view of FIG. 2.

FIG. 5 is a front left bottom perspective view of a bath pen showing my new design in a second embodiment;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The left, right, and rear elevational views are identical to the front elevational view of FIG. 6.