I found a really excellent article on the why's and wherefores of refilling the small (1#) "Coleman" type propane bottles and thought it would be a good thing to share. Site Disclaimer: The site is water-craft related, but the information may be indispensable when TSHTF and you need to refill your smaller propane bottles to run that ceramic disk heater or cook dinner: Refill Disposable Propane Cylinders! Actual Method LEGAL DISCLAIMER: This information, of course, deals with a very hazardous gas, under pressure. So, lets keep the legality disclaimer simple: Under no circumstances should anyone ever refill disposable propane cylinders using the above method. Also, the legalities of refilling the small "disposable" bottles is discussed. Take this under advisement. I am not telling you to do it, but it is good information to have. Sometimes, you just need to know how to do things.