Tip #2: Reduce waste and save some money by bringing a reusable water bottle. So you can't bring H₂0 or any other liquids more than 3.4 oz. (well there are some exceptions) through security, but you CAN bring an empty bottle. Just fill it up on your way to boarding your flight after screening.

Yes, you can absolutely take an empty plastic water bottle—or any empty reusable bottle like a Nalgene or Hydro Flask—through airport security and onto a plane in 2026. The TSA and global security agencies only restrict the volume of liquids, not the container itself. By bringing an empty bottle, you bypass the "3-1-1" rule because the bottle contains no "gels, liquids, or aerosols" that could be a security threat. Once you have cleared the security checkpoint, you can fill your bottle at one of the many "Hydration Stations" or water fountains found throughout most modern 2026 airport terminals. This is a highly recommended "travel hack" because it saves you from paying the exorbitant prices for bottled water inside the terminal (often $5-$7) and helps reduce single-use plastic waste. Furthermore, staying hydrated is crucial for preventing "jet lag" and deep vein thrombosis (DVT) during long flights. Just ensure the bottle is truly empty before it goes through the X-ray machine; even a small amount of liquid at the bottom can trigger a manual bag search, delaying your progress to the gate.