FIG. 1 is a front perspective view of a first embodiment of a writing instrument cap showing a portion of my new design as translucent;
FIG. 2 is a front elevational view of the writing instrument cap of FIG. 1;
FIG. 3 is a rear elevational view of the writing instrument cap of FIG. 1;
FIG. 4 is a right side elevational view of the writing instrument cap of FIG. 1;
FIG. 5 is the left side elevational view of the writing instrument cap of FIG. 1;
FIG. 6 is an enlarged top plan view of the writing instrument cap of FIG. 1; and
FIG. 7 is an enlarged bottom plan view of the writing instrument cap of FIG. 6.
FIG. 8 is a front perspective view of a second embodiment of a writing instrument cap showing my new design as opaque;
FIG. 9 is a front elevational view of the writing instrument cap of FIG. 8;
FIG. 10 is a rear elevational view of the writing instrument cap of FIG. 8;
FIG. 11 is a right side elevational view of the writing instrument cap of FIG. 8;
FIG. 12 the left side elevational view of the writing instrument cap of FIG. 8;
FIG. 13 is a top plan view of the writing instrument cap of FIG. 8; and,
FIG. 14 is a bottom plan view of the writing instrument cap of FIG. 8.
All portions shown in broken lines are environmental and illustrative only and form no part of the claimed design.