Ok so it sounds like it is more about the cold aluminum can and the hot air. Maybe the condensation mostly forms in the can then and not the lines. It makes sense to me that the increased cold surface area matters. Not sure on the turbulent flow really. I still don't see how it is a totally "closed system" since air is coming in and out. Maybe we need a heating and cooling guy and a weatherman to explain it. Anyways, I bet that if you insulate the can it might help. Possibly insulating the lines as well?? This got me thinking. Maybe I could just slap one of these on and see what happens but the problem is that I threw all of mine away when I bought the yeti ones that I never use anyway. I have included pictures below of 2 models one for those of you who are single and one for those who are married.







