No, I wasn’t talking about merely diluting it, but adding a sufficient quantity of water such that the accidents of wine no longer are present – and therefore, the Precious Blood would no longer be present.
So purifying the individual glasses in a larger container the way you describe it after Mass is not allowed. [/quote]
Strictly speaking, what I described wouldn’t be purification, per se. It would be akin to what is typically done with a purificator or other linen, when the Precious Blood is spilled onto it.