Jesus definitely did not use either the word cup or the word chalice since He was not speaking english.
since no one knows the form of the vessel Jesus used when He established the Blessed Sacrament, why make a big deal of the english word used to describe the form of the vessel. maybe the form was that of a bowl as some one earlier wrote, or perhaps it was the form of a jug. nobody knows.
would every one feel better if we substituted the word “vessel” for both those who like cup and those who like chalice when we say the words of consecration in english since that is the most generic and least descriptive word in english for something that holds a liquid?
now i ask myself, why am i even writing this.