63. Bring an Empty Reusable bottle
What you need: Empty, reusable water bottles
Est. Cost: $5*
Water is a basic human need, and airports charge a lot for it. The cost of a single bottle of water at airports is outrageous. You can save money by using a reusable bottle. You can only bring it in if the bottle is empty. So make sure you drink all of it before you enter.

You can refill it with a free fountain of water or ask the bartender. Continue to refill the bottle and you’ll save money on your next trip.