sorry guy (fourtwenty), i misunderstood. i made mine without cheesecloth once, i used a metal mesh coffee filter. the holes were big enough to let the butter through though, whereas a paper filter wouldnt work. you can get cheesecloth at most grocery stores, and i've seen many dollar stores that carry it. other than that, i've searched the internet and have not found anything that works as well as the cloth.

DannyR: a double boiler is an actual thing. you buy the two metal pots together, they fit into eachother. you won't have much luck trying to get two different pots to work, unless you can macgyver something. if you DO have a double boiler, the water in the lower pot can be as hot as you want. i don't believe it transfers enough heat to boil the top pot, it just gets it to the right temp. sorry i cant be more specific, you might have some luck googling that one.