Oh, wow. Good thing I found out about this first. I was just about to buy 25 lbs. Another way to do this is using liquid CO2 pretty much the same way. Has anyone ever done this before? I think you just put the CO2 in a container like the dry ice and it works the same way. Well, this probably has to be the same temp. as dry ice wouldn't you think? Maybe I'll just stick with the gas tanks even though they are much more expensive than dry ice i think.