Maybe I'm missing something here, but if you've waited until the ashes are completely cold (which you should), why not just pick up the bottom section of the WSM and dump the ashes into whatever container you're using? In my case, since I have a wooded area behind the house, I just pick up the bottom section and dump the ashes over the fence. Foil, pans, scoops, all seem like a lot of unnecessary complications.