These winecoolers work pretty well, we have one of those as well. Usually you have to submerge them in cool water, then dry them off before use. I've found it does a wonderul job of keeping the wine cooled, even on hot summer days.

That said, I have no idea of the 'technology' behind Doug's carafe. It's probably something as he himself states, but then it puzzles me how it can cool below room temperature, without any extra energy added. Normally all items in a room heat up or cool down until they reach room temperature, but this thing doesn't. Strange. I must say I'm intrigued!