Full Earthen Jug

Full Earthen Jug is a plot item in Dragon Age: Origins.

Acquisition
Obtained when the Empty Earthen Jug is filled with water from the fountain in the northeastern part of the Lower Ruins of Brecilian Ruins.

Involvement
To be placed on the Altar, drunk out of, and emptied subsequently as part of the ancient elven ritual in order to open the locked Metal Door leading to the Elven Burial Chamber. See The Mage's Treasure side quest for more details.