Actually not a bad idea. You can get one of those little power inverters for your car for about $20 that will put out 110v.[/QUOTE]
I have a reptibator in storage that I guess I could pull out for the trip and plug it into an inverter, or invest in the car warmer/cooler unit. What I'm concerned about is the bumps and vibrations. Rolling eggs are not good, but can an egg withstand 12 hours of car vibrations?