I get asked a lot about how I keep on my budget, and eat healthy while on the road.
I picked up a cooler that plugs into my cigarette lighter. This cooler is the one I have. The cooler says it will cool to at least 40 degrees less than the outside temperature.
I have had the cooler for a few weeks. I keep a gallon of water, mustard, ketchup, relish and some other beverages.
The only thing that I would point out, which is common sense, but watch out if you plug this device into a full time power outlet. This thing can not be run on your battery for more than 2 hours, or you will risk your battery being killed.