How to Remove Soap from PVC Pipe

I have heard that one can use PVC Pipe as a mold for their batches of soap.  Honestly, I have not tried it before.  But I always wondered what was the best way to get your soap out.  I found this post from Lovin' Soap called How to Remove Soap from PVC Pipe that has some tips and a video on how to do this.  So if you have PVC pipe lying around and you are short of a mold for your soap batch, then you may want to give this a try.