But to help answer your question, Nubius is right. It would take some insane planning and mechanical drawing skills on your part. You could do it, and I imagine it would prove to work quite well if you did it right. I mean, they are metal, and metal stays cold failry easily, so it would add some sub cooling to the water. It would certainly look cool, but would be one hell of a b!tch to do. I imagine it would cost you some pretty serious dough as well. If your going to do it, the only thing that will stop you is you! Go for it and tell us how it works out! The only thing that limits you is your imagination.