How weird
My tec on the inside of the box has ice on it when it is 25C.
But then again i am a bit of a smart a$$
When you build a peltier box you just make it bigger so you can put some special ice bags in it that have been frozen to -15.
I have something here that can be frozen to twice colder then dry ice.
So that is -190C
See here
http://cgi.ebay.com.au/10-Techni-Ice...item3a568d12a4
You can cut them in nice blocks and are good for when the fridge stuffs up.