Quote: donny hkr "Good question I've taken a flask in a few times and never been stopped, it is clearly visible, i'm carrying it. I suppose it's because cans are easily ripped and could be used to cut someone, might not matter if I batter someone over the head with my flask'"
Flasks are ok just as long as you only sit on the left hand side of the gangway, at least for the first five minutes until someone else turns up.