ARB's 50 Quart Fridge Freezer is the best upgrade you'll find from a standard cooler. Unlike other 12 volt coolers, this unit is an actual refrigerator/freezer with a fully functional set of temperature controls to keep all your snacks, food, and drinks cold no matter the ambient conditions. Powered by either AC power (at home) or DC power (in your rig) this Fridge Freezer is a must have for any serious roadie.
The ARB Fridge Freezer is packed full of an assortment of features that--once you've picked one up--will keep you from ever switching back to a plain-jane ice cooler. The unit includes two power cords, one for AC operation at home (120v) and one for DC operation in your vehicle (12/24v). If you're planning on keeping the fridge as a full time unit in your rig, you can grab the ARB Fridge Freezer Wiring Kit which has 20ft of wire to reach from the fridge to your battery as well as a screw in DC port. Additionally ARB offers a Fridge Freezer Slide that lets you easily pack and access your Fridge Freezer from the back of your rig.