Pack Bottles of Ice
There’s nothing more annoying than buying a drink at an airport store and getting it confiscated before your flight. You can’t really do anything about it since they’re taking away your bottle for “safety” reasons. Seriously, how dangerous can a bottle of 500-ml water be?
What you can do is “smuggle” bottles of frozen water, a.k.a. ice, onto your plane. The security guys can’t do anything since it’s not a liquid, and the ice will eventually warm up and turn into water during your flight. Take that, airline capitalism! That’ll teach you guys to mess with our bottles of water!