I make soap on a rope quite often with M & P. I also make loofah soaps, using pvc pipe, and its hard to get them out, even with freezing. If your using M & P, its much easier to find a cup, or something else to mold with other than the pvc. I finally had to get hubby to get my loofah out of the pvc. Doesnt help when I have NO patience. Good luck to you.