A Chalice of Water (there are commonly supposed to be 20 of these items) is a large Bronze cup with a flared base and wide bowl edged with gold. The outer surface of the bowl is divided into 14 panels, each embossed with the image of a women pouring water from a jar. It would make a fine drinking vessel.
If a 40th of a Tirol (around 1 pound) of flammable material is placed within the bowl and burnt, then the Chalice fills with 1 Arin of clean fresh and cool water. Each time it is used one of the figures blackens. If all the images are blackened the Chalice ceases to work.
If the Chalice is bathed in fresh clean river water and carefully scrubbed for at least ten minutes, the blackened figures return to normal.