Built in Cooler in the Galley

So I was thinking of doing a modern cub style where the hatch is extended all the way down and under, but I had a thought last night about doing it the old style and having the space underneath the counter be a built in cooler. I have seen these on the older models, and I was thinking with all the new advancements, there has to be a better way to keep the thing from sweating. If I am just inviting rot, I would rather skip it, but if it can be done I think it would be cool, not to mention simplify construction, and maximize space utilization. So what are some suggestions for this? I would like to wall in all the open space below the countertop and insulate it somehow and build a custom cooler that follows the shape of the rear of the tear. Here's some pics that inspire me. Any construction, insulation suggestions?
Just like this, but there's got to be a better way to insulate...



Just like this, but there's got to be a better way to insulate...
