Toilet
A toilet is a sanitation fixture used for human excrement disposal.
Location
Toilets can be found in almost every building's toilets.
Uses
Currently, toilets can only be used to fill up your Water Bottles, similar to Faucets, Bathtubs and Wells.
Currently, there is no chance of the water being contaminated. However, in future updates, there might be consequences to drinking water from such a source.
(Note: Do not drink water from toilets in real life, as it could lead to serious health hazards.)
Shutdown
After approximately 5 days in game time, the city's water supply will run out, meaning you have to rely on whatever beverage you have left to survive.
An alternative to finding a new source of water would be to migrate to the nearest well in the farmhouse following the path on the Northern Highway.