I was at my parents this week. My sister lives there with her toddler. My son blew through all 5 diapers I packed him in a relatively short amount of time and I didn't have a means to leave and get more at the time. She uses cloth and trainer pants on my niece, so she let me use a trainer underwear on DS while I waited for DH since they are about the same size. He was wearing it a while and then randomly stripped off his shorts, and the trainer and before I could stop him... peed on my parents kitchen floor. It was like he knew "this is not my diaper and I will NOT pee in it". Haha. I guess you had to be there but it was pretty amusing!