Switch operated Cool(er) for 2

This will be my first Instructable, I stumbled across this website about a week or so ago, and it immediately became an addiction. I was almost overwhelm because I couldn't decide which Instructable I wanted to work on first; I'd saved about fifty or so to my favorites on my first run through!

But when I came across an Instructable for one of these cooler A/C contraptions, I knew.

I live in Macon, Georgia. The Summers here are very hot and humid. My car does not have A/C, it needs a new compressor, and to get everything professionally fixed it would cost me about $1,200. I built this thing for about $12 (because most of the stuff I had just lying around). It isn't quite powerful enough to combat the heat coming through windows during the day, but in the shady carport it was able to keep the car cool. Plus I'm going camping this weekend and this contraption will be great for keeping my fiance and I cool, as well our beer. Not to mention the awesome cup holders

I made the Cool(er) by observing a few different Instructables, learning the basic mechanics, and then starting the creative process.

The creative process didn't happen until a drunken Sunday night a few days ago at a buddy's house (that is how most creative processes start ya know).

That drunken night ended with:

-3 holes in an old cooler (which I found half buried in the crawl space under my house then painted black and white with some spray    paint I had lying around)
-2 of which are for circular car vents to cover and direct the air flow (stumbled upon 'em at a flea market, two for $1)
-1 larger hole for a computer fan for suction (about $8 at Radioshack) which I covered with a noodle strainer I cut to fit ($.50 flea market) and powered with a miscellaneous 12V DC power adapter ($1 flea market)

I connected the wires, threw in some frozen stuff (literally stuff, I had some water bottles freezing at home but a drunken drive to retrieve some bottles of ice wasn't happening, frozen peas and meat worked just fine), then plugged it in.

SUCCESS!!!

The Cool(er) worked great! Notice how I have the vents facing out. Its so two people can sit with the Cool(er) in between them and enjoy a cool breeze.
My friend and I were really freakin' ecstatic about the beer / cup holders, but we weren't totally satisfied.

We got to talking about little ways to improve on it like adding a on/off switch and making it easy to switch the power source with different adapters or even a 12V battery.

Then, while searching for switch ideas I came across the current week's challenge: Switches :)

Hope y'all enjoy my Cool(er) Instructable!

Step 1 Getting started

The instructions part of this Instructable will actually start on step two. Building a Cool(er) is pretty straight forward and simple; you create an opening and place a suction fan for hot air in, create at least one opening  for cold air out, add a power source and some cold stuff and then BAM! You've got a Cool(er).

I'm not going to give you instructions on how to build one of these cold air contraptions, it'd be kinda arbitrary because their are already so many on this site. I'd rather challenge you to take the base idea and get creative.

Besides, this is not an Instructable about how to build a Cool(er). This is an Instructable that focuses on how to integrate convenience into one of these cold air contraptions by adding a switch and making it easy to switch out the power source.

So step one:
Get creative and create a Cool(er)