Nevermind that, I once tried to board a flight in Dubai with a completely empty water bottle. Just before I boarded the plane, security stopped me and rummaged through my bag for a minute or so as though they were looking for something then just threw my empty bottle out, saying it was not allowed. I was thirsty for the whole flight because of that. They did, however, manage to foil my plan of bringing down an A380 with an empty 200ml bottle.
