Well, the old water jug story might revolve around a magical water jug. In the story, the jug could have the power to produce an endless supply of fresh, clean water. It was discovered by a poor farmer who then used it to help his drought - stricken land and the people around him, and it became a legend in that area.
The old water jug story could be about a special water jug in a small village. It could be that this jug was the only source of clean water for the villagers during a difficult time, like a drought. People would queue up to get water from it, and it became a symbol of hope and survival in that community.