FIG. 1 is a top, front, right perspective view of a collapsible water cooler container showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view, the left side elevational view being a mirror image thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line showing of a water cooler base is for illustrative purposes only and forms no part of the claimed design.