The Sacred Chalice of Rixx is an important artifact to the Betazoids. In the 24th century, Lwaxana Troi, daughter of the Fifth House of Betazed, was holder of the Sacred Chalice -- something she never failed to mention in formal introductions. (TNG: "Haven")
According to Deanna Troi, the Sacred Chalice of Rixx is "an old clay pot with mold growing inside it." (TNG: "Menage' A Troi")