I assume by your question that you are asking about the time the Lord Jesus instituted the ‘remembrance feast’ by asking His followers to remember Him with the emblems He gave of the bread and wine to represent His body and blood.  This is mentioned in Matthew, Mark, and Luke.  Let’s read the account given in Matthew 26:26-28, “And as they were eating, Jesus took bread, and blessed it, and brake it, and gave it to the disciples, and said, Take, eat; this is my body. And he took the cup, and gave thanks, and gave it to them, saying, Drink ye all of it; For this is my blood of the new testament, which is shed for many for the remission of sins..”

At this point, Judas had already left to betray the Lord (read John 13:21-30), so the Lord was in this upper room with the remaining eleven disciples.  He then made known His desire that His followers would remember Him in this fashion.  He took a loaf of bread, blessed it, and designated it to be the emblem of His body “which is given for you.” (Luke 22:19). He broke the loaf to signify the giving of Himself and gave it to His disciples that they might eat of it as a remembrance of the Lord.  (It is important to point out at this juncture that the Lord had not yet died, but in announcing His soon coming death, he initiated this service beforehand.)

Afterwards, the Lord took the cup, gave thanks for it, and designated it to be the emblem of His blood which was “shed for many for the remission of sins.”  What a somber and sobering scene this was!  In a calmness that defies reasoning, the Lord Jesus spoke openly of His impending death, knowing that it was merely hours away that He would be crucified. 

AFTER DOING SO MUCH FOR SO MANY, AND ABOUT TO GIVE HIS LIFE FOR THE SALVATION OF MANY, THE LORD ASKED SIMPLY TO BE REMEMBERED BY THOSE WHO KNEW HIM AS SAVIOR.

Picture the scene now as the Lord broke that loaf of bread.  He handed it to one of the disciples, who passed it to another, who passed it to another, until all of them had taken a piece of bread from this loaf.  After the loaf had been passed around and eaten of, the Lord then took the cup, and after prayer, repeated the previous procedure of passing it to one disciple, who drank of it and then passed it to another, etc.

We must notice that in the institution of this remembrance feast, symbolism was so important.  Just imagine that a simple loaf of bread could represent the very body of the Lord Jesus and the cup could represent the very blood of Him.  ONE LOAF and ONE CUP.  The importance of these singular emblems is later mentioned in 1 Corinthians 10:16 which says, “THE CUP of blessing which we bless, is it not the communion of the blood of Christ? THE BREAD WHICH WE BREAK, is it not the communion of the body of Christ?” 

So, the disciples ate from ONE loaf and drank from ONE cup as the Lord instructed them to do.  Is it important that we follow that example and use one loaf and one cup when remembering the Lord?  YES.  We should follow the example as close as possible.  It was no small thing that the Lord chose these particular emblems and instituted the feast in this fashion. 

What about the one cup?  Sometimes in a large crowd, there could be literally hundreds drinking from the same cup.  Is it healthy to drink after each other, especially in this time of a dangerous pandemic?  Some people just do not like the idea of drinking from the same cup as others.  What would the Lord have us to do?  This is a matter for much prayer and discussion as we seek to honor the Lord. 

For a point of reference, I will tell you what our church group does now that we live in a time of possible infections.  We still have one cup that we use as we thank the Lord for it and thank Him for shedding His blood for us.  After the prayer, we pass out individual cups so that everyone has their own and does not have to drink after anyone else.  In this way, we believe we are still honoring the ONE CUP, but are still cautious about avoiding any cross contamination.  I encourage your group to pray and talk about this together and see how the Lord leads you as you sincerely seek to honor Him.  (445.4)