Originally Posted by
STBCypriot
Bring an empty water bottle with you and then fill it at a fountain after you go through security. Then you can have all the water you want with you on the plane. Of course, this only works in airports where there are water fountains - fountains are not very common in European airports.
Amen to that.
If there are no fountains in the airport (or if you drain your bottle), then after the drinks/meal service has calmed down, you can go to the galley/ring the FA and ask them to top-up the bottle for you - I have never been refused.