Article: The abundant variety of natural life depicted in the Butrint mosaics celebrates the richness of God’s creation; some elements also have specific connotations. The kantharos vase and vine refer to the eucharist, the symbol of the sacrifice of Christ leading to salvation. Peacocks are symbols of paradise and resurrection; shown eating or drinking from the vase they indicate the route to eternal life. Deer or stags were commonly used as images of the faithful aspiring to Christ: "As a heart desireth the water brook, so my souls longs for thee, O God." Water-birds and fish and other sea-creatures can indicate baptism as well as the members of the Church who are christened.

Question: What do the katharos vase and vine refer to?
the eucharist