We usually buy a bottle a duty free and keep it under our seat. Then we order our first drink and pop from the stewardess. We just keep our glass full of our own liquor. We drank nearly 2 bottles of wine on a 1 hour trip from London to Dublin!!! Practically for free!!! (So bad) :mnm:
We killed a bottle of Jack Daniels on the flight to germany. Nothing like being hung over before hitting Oktoberfest!
I don't think for me drinking on the flight would be a good idea...I can get a bit useless after a few drinks, so if anything happened at customs it would be a mess!