If you're looking to make your own pot, or, customize a current sub-zero setup, I've found a great source of cheap very high quality copper.]
Go on e-bay and search on "copper bullion"
I bought a 1 lb block of .999 pure copper that would fit nicely under a SS head for under $10. I also got a Kilo block of .999 pure copper for $17.45
If I knew how to melt it I'd get a few more blocks and play some.
This is "investment quality" copper and comes very nicely finished. Not like the shit I paid $30 bucks for 2 little 2in x 1/4 in slices a few months back
