This evidently came out last year and is a new product a lot of hippies might be interest in. The basic principles are so insanely simple I would be shocked and amazed if we don't see other manufacturers cooking up even more complex versions, but this one is obviously aimed at low cost. Now that thermal conductivity has been discovered to require symmetry in positive and negative charges, I expect someone will come out with an even better system at some point, but that could be ten years down the road, while this is better than I thought was possible on a low budget.
