Q: What is the container that holds the Eucharist? A:
The container that actually holds the eucharist is called a ciborium, it resembles the chalice except it has a lid usually topped with a cross, dove, or image of christ. The eucharist is distributed from the ciborium. The container in which the ciborium is reserved is called a tabernacle. The glass disc that contains a large host for adoration is called a luna, and is kept in a round container called a capsula, the luna is placed in a monstrance during benediction of the blessed sacrament. Both the capsula and the ciborium are covered with a veil within the tabernacle.
A pyx or pix (Latin: pyxis, transliteration of Greek: pyxis, box-wood receptacle, from pyxos, box-tree) is a small round container used in the Roman Catholic, Old Catholic and Anglican Churches to carry the consecrated Host (i.e., the consecrated Eucharist), to the sick or invalid or those otherwise unable to come to a church in order to receive Holy Communion. The term can also used in archaeology and art history to describe small round lidded boxes designed for any purpose from antiquity or the Middle Ages, such as those used to hold coins for the Trial of the Pyx in England.