Carry A Refillable Water Bottle
This airport hack is going to save you quite a bit of money, especially if you drink a lot of water. Bring your own refillable water bottle when you travel. Be sure it’s empty, though, so you can get it past security. There are free water bottle filling stations located throughout most major airports. No more paying $7 to quench your thirst, and you’re helping the environment!
If the bottle doesn’t fit into your crammed-full carry-on bag and it’s a model with a loop at the top, you can attach it right to your bag’s straps.