I've been out of the proper shaving game for about a year now in favor of the fast and cheap alternative, but I'm looking to get back into it now. I'm picking up a few different types of cheaper soaps (Williams, VDH, Col. Conk, etc.) to practice making lather and see what kind I might like for a go-to, but they don't really fit the mugs I have. I know that a lot of guys melt their soaps down to fit other containers, so I was wondering about the rules of melting soaps down. Can certain kinds not be melted without negative effects, are there certain ways I can/can't melt them, or other questions I've forgotten to ask.