9) Bring an Empty Water Bottle
If you are flying, you are likely familiar with the restrictions on bringing liquids on planes. However, if you have to buy drinks at the airport, you can pay quite a lot. Therefore, you will be best off bringing along a water bottle that you can fill up at a fountain. You can bring an empty bottle even in your carry-on bag. And most bathrooms will have a free water fountain nearby. This is a much cheaper way to stay hydrated on your travels. However, depending where you are, you may want a more sophisticated bottle. That is, if you are traveling somewhere that does not have good tap water, you may want a bottle with a built-in filter. This will help you out especially if you plan to be very active during your trip.