I have done it. Lots of videos out there. A bit of trepidation the first time. The challenge is getting more than a half pound in there. I tried freezing the empties and that helped. I finally did mess with the valve and with some medical pincher scissor type things, pulled the valve on the empty to get it fully empty. Small needle nose pliers would work too. Then after a few times, I did start pulling the valve to release some pressure after the first fill attempt. That then let me fill it to the 1 lb. Actually it was over a lb and I let some out so that it was exactly a pound net weight of propane added. I used a kitchen digital scale and weighed as I went; before and after, that sort of thing. <br /><br />Looking the way that the propane hisses around when you get your tank filled on the RV, you start to realize that propane can be as safe as gasoline. But yes, please make sure you do understand what you are doing first, and second and then yet a third time thinking it through, then try the reload. <br /><br />I picked up some brass caps as well to screw on to the tops instead of the white plastic things. The leakage from the top is what mostly concerns me.<br /><br />I do like the little canisters with the Buddy Heater even though I do have both a tank and the RV mounted tank adapter with the hose. It is easier to move it around the rig without the hose.