Cooler

FIG. 1 is a perspective view of a cooler, in accordance with our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dash-dash broken lines shown illustrate portions of the cooler that form no part of the claimed design.