yeah yeah...I do that too, I have two lines for the stoves, plus a small gas bottle, plus two l20lb tanks...plan B when you are glam camping Billyboy!!! I like using these for lanterns - makes them portable, plus....
I just like collecting shit
"The difference between stupidity and genius, is that genius has its limits." - Albert Einstein
They work great. I use an adapter I got from Amazon. Just don't overfill it. If you put the 1 lb cylinder in the fridge or freezer before filling, the temperature difference will allow much more to transfer.
They cost $4-5 new and maybe $1 to refill, so that's pretty simple math on how it's saving money.