The stores could send them to a local sanitation depot. I've seen setups in cities where all the restaurants used such a service. When you sat down the restaura

The stores could send them to a local sanitation depot. I've seen setups in cities where all the restaurants used such a service. When you sat down the restaurant would issue you set of plates and bowls in an autoclave bag. You got to open it yourself so you knew it was fresh. At the end of the meal the dirty dishes were scraped and dumped into a bin for cleaning.