What does everyone else use for packing up their parcels?
I use mixture of purpose bought grey mailing sacks (bought from an Ebay seller!), and jiffy bags. For certain things, I wrap in extra strong binliners. I don't open them up, I just use them flat as they are when they come off the roll, and treat them like a sheet of wrapping paper. I find they work really well, and don't get affected by water in the way brown paper does. If I need bubble wrap, I get sheets of it from the supermarket - check out the apple and banana trays, they're often lined with sheets of bubble wrap. Also, about once a month I ask on Freecycle for any jiffy bags that people have lying around. Often people will give your their stash of 20 or 30 that they've been collecting. Every little helps! I have on my 'me' page that I use recycled materials where possible, and haven't had any complaints so far.