Montanero... I'm sure you know this with all of your service out of the country, but for others... if you pre-chill a 5 or 7 day cooler with ice, and then transfer frozen 1 gal jugs(about 4) and then your frozen or chilled perishables, the upright cooler does a better job of preventing cold air spilling out when opened...just don't let the little guys open it... and probably better insulated than your refrigerator... an that is with the inexpensive Igloo/Coleman coolers and not the roto molded Yeti style

during the 2004 9 day power outage, one cooler that was not opened till day 8, still had partially frozen water jugs