We could use plastic bags as fabric!
When we went for the weekly shopping trip, we kept all of our bags and stored them in our "project basket" to make sure that they would be fused this week. We finally got time, and cut, folded, and ironed our plastic. It turned out a bit wrinkly, but we credited that to being our first try, and gushed over the ideas of what we were going to do with it.
We don't own a sewing machine, so we hand-stitched our first plastic fabric into a little pouch which we soon deemed a coupon holder :)
We sewed on a button, and a little crochet chain for the closure, and it's ready to go!