I used Pringles cans a lot before I could save up n buy molds.. The original ones made soap too big for my tiny hands but the local version was just right. I never lined either. I get mixed results unmolding. Sometimes the soap just slid out and I can clean and reuse the can. Sometimes I have to tear it out lol One of first soaps posted here was molded in a Pringles can, somewhere in October last year. No DOS or anything, seems to have no nasty side effects after a year.