aSavings via eBay offers the Knox Gear 12-volt 27-Quart Cooler/Warmer in Blue, model no. KN-CCW27QB, or Red, model no. KN-CCW27Q, for $59.99 with free shipping. That's the lowest total price we could find by $20. It plugs into your vehicle's DC outlet via a 5.5-foot cord and cools your food to 40 °F or heats it up to an enjoyable eating temperature.

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