Tea in the Market

With few or no paper products used on NewEarth, what happens with all the mugs and cups that people take at the market? Who collects and washes them? How far do cup collectors have to go to find them? Are there people who search the market grounds looking for empty cups and bringing them all back to a single washing station? As the writer, I know all the answers, but you can look for clues in the books about how the market runs.