Cooler

FIG. 1 is a top perspective view of the cooler showing the new design; FIG. 2 is a front elevation view thereof; FIG. 3 is a rear elevation view thereof; FIG. 4 is a right side elevation view thereof; FIG. 5 is a left side elevation view thereof; FIG. 6 is a top view thereof; FIG. 7 is a bottom view thereof; and, FIG. 8 is a bottom perspective view thereof. The broken lines in the figures illustrate portions of the cooler that form no part of the claimed design.