I finished this a little while ago but it took a while to come around to the idea that it takes 200 ltrs of beans to fill it and not just one. Ok, fine - I was just too lazy to go and buy the second lot!Its made of green cord and from instructions on http://www.wikihow.com/Make-a-Bean-Bag.
With the top folded over!
I added a zip to the bottom so it can be removed. Though I was too lazy to create an inside bag so the beans will need to be removed if the zip is used to open and wash the bag! (Ah well!)
Quite happy with the outcome. I would make it squatter and rounder the next time (if there is one!).