15. Always Carry a Refillable Bottle of Water
Needed: water bottle
Est. Cost: $5-$20*
The TSA will not allow you to take liquids larger than a certain amount through security. They may even throw them away in your face with a stern expression. But buying a $10 water bottle at the airport is equally as unbearable.
Bring an empty, refillable water bottle through security. You can fill it up at the drinking fountains or sinks located in airports, saving money on airport concessions.
