Inspired by the thread about festival peeing, which I can't find, I just thought I'd share my own DIY disposable peebags.
You will need, a small bucket, or stability device, we use the portapotti from ds was potty training, some resonably sized nappy sacks, the biodegradeable ones are good, however the value ones are a but small and thin, and a packet of value nappies, Tesco size 5 are the ones I've been testing with.
Open nappies and cut out absorbant pad, cut pad into 3 equal rectangles. This gives you 60 absorbant pads for £1.41 currently, that's a lot more wees for you pound than a travel John.
Line your bucket, potty, with the nappy sack, put pad in bottom, pee, tie up bag and dispose of in rubbish. My not very scientific testing, measuring jug of water, shows that each pad will hold around 400 ml of water before it reaches max capacity, big enough I reckon for even a morning wee :)
I've not tried peeing directly into a bag with a shewee, but i might practice :)
The whole lot packs up nice and small, though the potty requires a small bum, better ideas for a small stability device are welcome.