ACOPOWER 42-Quart Portable Freezer/Fridge for $519 today only on Woot! – Amazon has this for $759!  The 12 volt refrigerator has a strong compressor that can drop the temperature to 32℉ in 20 min with max mode; the energy-saving design allows it to be used continuously for 10 hours at 32℉. With a couple of batteries, you’ll never worry.