Cooler box

[0001]FIG. 1 is a top, rear, left side perspective view showing my new design;

[0002]FIG. 2 is a front elevational view thereof;

[0003]FIG. 3 is a rear elevational view thereof;

[0004]FIG. 4 is a top plan view thereof;

[0005]FIG. 5 is a bottom plan view thereof;

[0006]FIG. 6 is a left side elevational view thereof; and,

[0007]FIG. 7 is a right side elevational view thereof.

[0008]The lightened portions of the cooler box shown in FIGS. 1-7 illustrate environment and form no part of the claimed design.