I hadn't seen one of these toppers before and they look dope.
www.twozone.com.au
It's a shockwavey site, but if you click around you can see how it works.  Goes on top of your Engel or ARB to add space and even has the posibility of making it a freezer on the bottom and fridge on top.  That'd be dope.

Sure, no one needs one, but it's sooooo coooool!!!

That is pretty cool. cold beer/ice cream, crisp veggies, and it increases the capacity of the fridge to boot.

If only I had an ARB/Engel freezer fridge. :-(

It is interesting. The main issue I could think of is that if the bottom is used as the freezer and the top would be at refrigerator temps, you'd have a really big freezer and small fridge. Also, it wouldn't fit in my Disco.

Hmmm, $345 for my Engel 45. Its a bit stee, but the coolness factor is very high!