Dry Ice in the Ice Box ?

[shibbershabber]

I am looking for ideas to make the ice box actually cold... ANYTHING... some reduction in temperature. Its basically a cupboard.

I am planning on installing a refer system in it soon, but in the mean time I am using a cooler set in the cockpit filled with ice.


I have never used dry ice for anything, but it seems like it would be a good idea. It evaporates as it thaws so there is no drainage to worry about.

So have any of you used it? Is it expensive? hard to find? Somehow incompatible for boat use?

thanks!