FIG. 1 is a perspective view showing my new design;

FIG. 2 is a front elevational view of the writing instrument of FIG. 1;

FIG. 3 is a left side elevational view of the writing instrument of FIG. 1, the right side elevational view being a mirror image thereof;

FIG. 4 is a rear elevational view of the writing instrument of FIG. 1;

FIG. 5 is a top plan view of the writing instrument of FIG. 1;

FIG. 6 is a bottom plan view of the writing instrument of FIG. 1;

FIG. 7 is a perspective view showing a second embodiment of my new design;

FIG. 8 is a front elevational view of the writing instrument of FIG. 7;

FIG. 9 is a left side elevational view of the writing instrument of FIG. 7, the right side elevational view being a mirror image thereof;

FIG. 10 is a rear elevational view of the writing instrument of FIG. 7;

FIG. 11 is a top plan view of the writing instrument of FIG. 7; and,

FIG. 12 is a bottom plan view of the writing instrument of FIG. 7.

The dashed lines are for illustrative purposes only and form no part of the claimed design.