As to the matter of couches..

Ok, i read up all of the burlap sacks and all the other ways to do it, but wouldn't a couch cushion work? I mean, the roots will crawl all throughout it, the foam is sturdy enough to hold the plant upright, and virtually a sponge. Always holds water. I just threw out an old couch an the idea came to mind. My friend did itonce with moderate results, but his mom came down on him. So any thoughts? Enjoy.