3. Bring an empty water bottle
Instead of buying an expensive bottle of water after you check in at the airport, bring your own empty water bottle as you’re actually allowed to do that. Fill it up on the other side. But this tip doesn’t only stand at the airport, you should really bring one wherever you go.
Not only will you help save the environment, you will also help your budget quite a lot, you’d be surprised. Of course, you should check if tap water where you’re traveling is drinkable, but if it is, you’ll save precious bucks you can spend elsewhere.