The water bottle is not the bomb, the water (or other liquid put in it) can just be a crucial ingredient for a bomb. So it's not going to explode unless you do something to it.
Also, this isn't original at all.
don't be a smaratass
Sometimes I just don't see how airlines stay in business. You pay like $200+ so they can fuck you.
I've always wanted to join the mile high club.
But say you have your own water. They won't let you take it through security. But once you are through security you can buy more water.
Ha, what if the person had originally wanted to blow up the airport? They'd just be like, "Oh okay." Then drop off the bomb in the air port, then leave the country after destroying the airport....