Inspired by kaputnik's recent interest in a trailer, and since one of the problems of the Washing Machine Challenge is that we need to source knackered washing machines, how about...
...we get our intrepid teams of competing-cargo-bike-type to start off unladen from some central Scandinavian coffee vendor and go out in search of the weirdest and most wonderful things flytipped around the city, then regroup at Seafield/Sighthill to have this bounty judged, and then dispose of it in a painfully eco-vegan muesli-knitting fashion?