FIG. 1 is a front perspective view of a bubble pen top in the shape of a globe showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a right side elevtional view;

FIG. 5 is a left side elevational view;

FIG. 6 is a front elevational view;

FIG. 7 is a rear elevational view;

FIG. 8 is a front perspective view of a second embodiment of my design of FIG. 1;

FIG. 9 is a top plan view of FIG. 8;

FIG. 10 is a bottom plan view of FIG. 8;

FIG. 11 is a right side elevational view of FIG. 8;

FIG. 12 is a left elevational view of FIG. 8;

FIG. 13 is a front elevational view of FIG, 8; and,

FIG. 14 is a rear elevtional view of FIG. 8.

The structure depicted by means of broken lines in FIGS. 1, 3 through 7 and 10 through 12 has been shown for illustrative purposes only and forms no part of the claimed design.