Recommendations for cheaper "stratacooler" benchtop coolers?

[Dima Klenchin]

:In article <7kdn1p$16rc$7 at news.doit.wisc.edu>,
:klenchin at facstaff.REMOVE_TO_REPLY.wisc.edu (Dima Klenchin) wrote:
:
:>Every lab has heating aluminum block sitting somewhere unused.
:>Place it at -20C and that's it. Not as convenient to handle but
:>the result is the same.
:
:You've checked the warming curve of these blocks, then?  IAMFI.
:

No, I did not. I just stuck termometer into it, and it kept below zero 
for one hour. Good enough for me. 

        - Dima