Well, this is one of those ‘politically correct’ questions.
I’ll pipe in, because no on has suggested boiling the water to purify it. That would be a good precursor to drinking it.
Contrary to the posts above, I don’t think holy water is meant to be drunk. It certainly is not stored in a safe fashion or treated for that purpose.
Perhaps a good practice is not to take an excess to begin with.
by the way, what significance does “holy” water have to you?
Does it remind you of the waters of the flood of Noah’s time? Or, does it remind you that Jesus said He is the living water? Is it a reminder of your baptism? Or, is it a throw-back to the Jewish custom of worshipers purifying themselves in baths before going up to the temple? Hmmmm?
If I ever knew what it was for, I have long since forgotten. But, I have given it the meaning for myself that it simply represents Jesus.