I've been volunteering at a food bank and sometimes get assigned to food rescue from a local grocery store. They have a fleet of Burley trailers we can borrow but I also built a plywood platform that ratchet straps atop the rear rack which can hold lighter items (mainly to keep the bike from getting too top heavy). Today there was a lot of carrot juice quarts, some whole pies, and bouquets of flowers amongst the usual stuff like bread and produce.