1 Corinthians 11:
23 For I received of the Lord that which also I delivered unto you, that the Lord Jesus in the night in which he was betrayed took bread;
24 and when he had given thanks, he brake it, and said, This is my body, which is for you: this do in remembrance of me.
25 In like manner also the cup, after supper, saying, This cup is the new covenant in my blood: this do, as often as ye drink it, in remembrance of me.
26 For as often as ye eat this bread, and drink the cup, ye proclaim the Lord's death till he come.
27 Wherefore whosoever shall eat the bread or drink the cup of the Lord in an unworthy manner, shall be guilty of the body and the blood of the Lord.
28 But let a man prove himself, and so let him eat of the bread, and drink of the cup.
“Cup” is used (first) both metaphorically and (second) by metonymy in this passage.
Metaphorically “the cup” is the new covenant – that which makes the new covenant possible and a reality.
By metonymy “the cup” (the container) is put forth for the contents it contains. It is the contents, not the container that is important.
In Matthew 26:27 the disciples were instructed to drink, that is, all were commanded to drink some of the contents of “a cup” – not necessarily out of the same container – but some of the contents. Again, it is the contents, not the container that is of importance. But, is this a binding example for us to follow?
I believe that the container is but only a means of accomplishing that which has been commanded – drinking some of the contents. But I believe the following will be more compelling as to whether one or multiple “containers” can be used in the “Supper”.
1 Corinthians 11:21 – “…for in your eating each one takes before other his own supper…”
Some of the Corinthians were bringing their own “supper” (a metonymy used for the bread and the fruit of the vine). In all of the abuse of the Lord’s supper at Corinth, Paul never condemns or remarks in reference to each having their own “supper”, but rather Paul addresses the abuses of excess, disorder, and lack of discerning of the purpose for which the supper was given – verse 26.
Admonitions begin in verse 27. The solution to each having his own “supper” is given in verse 33 – “Wait for each other…”
But individuals “suppers” appear to be permissible.
A single “container” is authorized. Multiple “containers” are authorized as expedients to accomplish that which has been commanded - "drink" of "the cup". To demand one or the other would be to bind where God has not bound!
The contents and proper self examination while partaking is everything.
(I will take up WHY things such as this ARE important at another time.)