The Fluvian jar, its volume magically increased by some Divine enchantment, will contain 100 draughts of water when filled from a water location. Each individual draught can clean one wall of graffiti or douse a forest fire from one room. If the contents of the jar are poured on an adventurer with the stink affliction, the smell will be washed away; the jar will then become entirely empty, however.
This cylindrical artefact of polished prismatic crystal can be bought from The Shop of Wonders in Delos for a few Mayan crowns.