Originally Posted by
malkie
In my experience you explain what you want in F and good crew will adapt to deliver on your personal expectations. Too many people expect mind readers for crew then complain afterwards.
This. And what's wrong with using the call button in First? Or, as you state, telling the FA that you would like two bottles of water and not to be bothered until landing - or "keep the drinks coming". Communication is key. Some people will say "but it's first class and I shouldn't have to!" but so be it.