I have some cupuacu butter that I have been using just as a facial oil. I only have about an ounce of it, but I use very very little and do not want it to go rancid before I can use it...so I wondered about putting it into soap, and what properties it would have. I can see the soapcalc list for the butter, but I'm never totally sure how that translates in use. Has anyone tried it?