A drink of water

Hello!

1. A drink is explained as material, e.g. an amount of a liquid which you drink, in COBUILD.
Does the expression ‘a drink of water’ refer to cases regardless of whether with/without containers to put it in?
2. In the sentence below, a long drink is used to refer to an action of drinking, which is long, not as material. Am I right in thinking this way?

quench one's thirst with a long drink of water. (OALD)

Thanks in advance

1. A drink is a drink regardless of the container from which it is taken.
2. A "long drink" would probably require a substantial amount of liquid.

Thank you very much for your replies.

I’m sorry, but I had forgotten writing about the next question at the same time.

What does the expression ‘two dinks of water, three drinks of water, etc’ mean?

Thanks in advance

Hello!

I came to a certain understanding about this matter.

That is to treat ‘a drink of water’ and ‘a slice of bread’ as equals grammatically. This seems to make the matter easy to understand. Both a drink and a slice are materials. Then the plural of ‘a drink of water’ can be understood.

Sincerely