Grail of kahless

A hologram of the Grail of Kahless

The Grail of Kahless was a silver chalice significant to Klingon culture.

On the Day of Honor, it was traditional to drink mot'loch from the Grail of Kahless. In 2374, Moklor had B'Elanna Torres drink from it. (VOY: "Day of Honor")

According to the Star Trek Encyclopedia (4th ed., vol. 1, p. 313), the Grail of Kahless once belonged to Kahless.