A curious element of the Roman Canon is that it refers to the chalice as “this chalice”:

Simili modo postquam coenatum est, accipiens et hunc praeclarum Calicem in sanctas ac venerabiles manus suas: item tibi gratias agens, benedixit, deditque discipulis suis, dicens: Accipite et bibite ex eo omnes…

Which I translate as:

In similar way, after He had supped, taking also this precious chalice into His holy and venerable hands again giving thanks to Thee, He blessed it, and gave it to His disciples, saying: All of you, take and drink this…

There is a tradition that the chalice used in Rome was once the actual chalice used by our Lord Jesus Christ at the first Eucharist.

When the Roman Emperor Valerian ordered the beheading of Pope Sixtus II in Rome, the Pope’s deacon named Lawrence sold the gold chalices and precious items and gave the proceeds to the poor. However, there was one item that was preserved. According to legend it was the chalice used at the Last Supper by Christ and served as the personal chalice of Saint Peter who had brought it to Rome. This is why the Roman liturgy reads: “hunc praeclarum Calicem.” Laurence gave this special chalice to a Roman soldier who took it to Spain.

Here is a photo of it paired with a painting from 1560 by Juan de Juanes that incorporated it:

And painted by Juan de Juanes:

If this tradition is valid, then this is the chalice of the Son of God and also the chalice of Saint Peter used by Peter and all popes up till the martyred Pope Sixtus II. The mystery of faith.

[reminder]