All these posts and not one person gave the guy the right answer. You can re-fill the 1lb green tanks easy from a 20lb tank. Got to amazon and search on a product called shnozzle http://smile.amazon.com/Shnozzle-SAFEST-Propane-Adapter-Cylinders/dp/B00EV59S1W/ref=sr_1_1?ie=UTF8&qid=1433289905&sr=8-1&keywords=snozzle Cost about 15$ Easy to do and comes with instructions.