I have been wanting a sketching chair for a while, and the wish requirements are probably not entirely realistic. It should be comfortable, weigh nothing, and fit into a pocket. The other week, I saw a promising object on Ebay, and made a bid (cheap) for it. Well, I got it and a few days ago, it came through the mail.
The seller calls it an “ice fishing stool”, probably a military model – or so the colour suggests – and it has seen quite a bit of use, being a bit bent and rusted here and there. it is surprisingly sturdy, although not exactly made to lean back in. It is very small folded and weighs 800 grams. I think this may turn out to be rather useful!