Cos(mopolitan) has a plastic container for the load, its a local shopping trailer (are they even still being made?)
the other 2 are a welded steel open frame 1 model suspends the rear wheel ..
Rubbermaid is a US brand , want a sturdier box ?, I assume you can look for one and substitute it,
saw a Bussing bin with a lid at the local restaurant industry supply store. it looked rugged ..
Last edited by fietsbob; 05-16-14 at 09:09 AM.