You can get 2" thick 4' x 8' boards in pink or blue. depends on which store you go to. $30 - $40 a sheet if i remember correctly.Hey that gives me an idea. What about at Home Depot or Lowes they have that insulation foam board. I have extra bits and bobs of boards and plywood. I guess it could be made out of wood or that foam board I could make my own size as your mentioned instead of a regular drink cooler.