The drink – is it mine?

This is a delicious mineral water.
This is Coca-Cola.
Such a beer.
Such a vodka.
Such a milk.

There are more exceptions than fall under the rule.

YYY: Exceptions only confirm the rule.

XX: Yes, I also think so. The more exceptions, the more the rule is confirmed. The ideal rule is a completely unworkable statement with an endless list of exceptions.