Volume 3 in the Kishibe no Uta series.

From MangaHelpers:

A collection of four stories about lands where there isn't much water. The title story, Touzoku no Mizusashi features a young thief that steals a strange water pitcher, which never runs out of water. A mysterious woman pursues him, intent on regaining the pitcher. What is the connection of this magical pitcher to the woman, and to the thief's past? Other stories include "Nigai Mizu" (Bitter Water), "Joudo no Mizuuri" (Water-seller of the Pure Land) and "Futatsu no Ido" (The Two Wells). [tethysdust]