I think that has to be 100% wrong as all staff in the UK when I was based there used to take empty litre or 2 litre bottles and fill them up in the crew room before flight, I think if is has a small amount of liquid in it you cant take it through, but empty for sure is fine.
Why the hell all this is just an issue for us in the UK is beyond me, flying in Italy I can walk through with bottles of wine under each arm smiling singing a song and then go to work! to land airside in the UK!
Its just plain silly
