Hi all. Over the weekend I wanted to work on a water purification system (using water stills), but couldn't find any hint on how to get / set water giving you sickness or not. What I want to achieve: Pot water from toilet --> water in container marked "dirty" --> giving you sickness Pot water from rainbarrel --> water in container has chance of being "dirty". Pass water through still --> water marked "safe". I was grepping through the lua code as good as I can but couldn't find anything. Is that possible at all? If so, does anyone know how?