It sounds like you're looking for quick & inexpensive cold beers. Be aware that you can convert your ice box to a functioning refer with aftermarket products. Waeco, the parent company that makes a very popular unit called the 'Alder Barber Cold Machine' has a very broad line of products that may suit your needs - if not your wallet. Here's a link:WAECO USA
Some are better suited for quick-install, others are more complicated. Everyone will tell you, and it's true, the insulation of the box is very very important. And that can be a big job.