As best we can tell from historic and archaeological data, ancient Romans peed in small pots in their homes, offices, and shops. When those small pots became full, they dumped them into large jars out in the street. Just like with your garbage, a crew came by once a week to collect those hefty pots of pee and bring them to the laundromat. Why? Because ancient Romans washed their togas and tunics in pee!
Human urine is full of ammonia and other chemicals that are great natural detergents. If you worked in a Roman laundromat, your job was to stomp on clothes all day long—barefoot and ankle deep in colossal vats of human pee.