Can You Bring Your Reusable Water Bottle on a Plane? (2023 Updated)


Many travelers are looking to use their reusable water bottles to stay hydrated on flights as a way to save money and reduce waste. However, navigating TSA rules and carry-on luggage restrictions can be confusing when it comes to what is allowed.

This comprehensive guide will provide you with everything you need to know about bringing your reusable water bottle on a plane, including TSA regulations, approved bottle types, and tips for filling up your container once you've passed through security.

water bottle can bring on plane

TSA Rules for Reusable Water Bottles

Understanding the TSA's regulations for liquids in carry-on luggage is essential when traveling with a reusable water bottle. The key rule to remember is the 3-1-1 rule: containers of liquids, gels, and aerosols must be 3.4 ounces (100 ml) or smaller, placed inside a single, quart-size, clear, sealable plastic bag, with one bag allowed per passenger.

Fortunately, empty reusable water bottles are exempt from the 3-1-1 rule and can be brought through security as long as they're empty. You can refill them at water fountains or bottle filling stations once you've passed through the checkpoint.

Note: The Messages in this article may be out of date. You can refer to the latest guidelines in the following ways:

By staying informed and following the latest guidelines, you can ensure a smooth and hassle-free experience when traveling with your reusable water bottle.

buzio 40oz water bottle

What Kind of Bottle is Allowed?

When it comes to reusable water bottles, the TSA typically allows most stainless steel and plastic containers. However, there are some guidelines to follow when selecting your bottle for air travel:

  • Opt for a soft-sided or collapsible bottle made from materials like silicone, as these easily fit into a crowded carry-on bag.
  • Avoid oversized containers, as they may draw additional attention at security checkpoints.
  • Be aware that aluminum containers may require additional screening.
  • Steer clear of glass bottles, which could be perceived as a potential weapon.

Filling Up Your Bottle Past Security

Once you've made it through the security checkpoint, you'll need to fill up your empty reusable bottle to stay hydrated during your flight. Here are some options for filling your container at the airport:

  • Bottle filling stations: Many airports now have dedicated bottle filling stations with filtered water, making it easy for travelers to fill up their reusable containers. Some airports with filling stations include San Francisco International and Seattle-Tacoma.
  • Water fountains: If your airport doesn't have a bottle filling station, look for water fountains on the airport map before your trip. You can fill your bottle directly from the fountain or use a cup to transfer the water.
  • Buy bottled water: If you're unable to find a filling station or water fountain, consider purchasing bottled water from a store or vendor in the terminal, then pour it into your reusable bottle.
  • Ask food vendors for help: Some food vendors may be willing to fill your bottle if you explain your desire to avoid buying another plastic bottle. They may be more inclined to help if you make a small purchase at their establishment.
  • Airport bathroom sink: As a last resort, you can fill your bottle from an airport bathroom sink. While not ideal, it's better than going without water during your flight.

Eco-friendly tips for travelers to reduce waste and save money

Bringing a reusable water bottle on your next flight is just one way to adopt a more eco-friendly approach to travel. Here are some additional tips to help you reduce waste, save money, and minimize your environmental impact during your journey:

  1. Pack reusable utensils and a cloth napkin: Instead of using single-use plastic cutlery and disposable napkins, bring your own reusable set to use during in-flight meals or at airport food establishments.
  2. Carry a reusable tote or shopping bag: Rather than relying on plastic bags from airport stores or duty-free shops, bring a foldable reusable bag to carry your purchases.
  3. Opt for digital documents: Use digital boarding passes, tickets, and maps on your smartphone or tablet to reduce paper waste.
  4. Choose eco-friendly travel-sized toiletries: Look for travel-sized personal care items that come in recyclable or biodegradable packaging, or bring your own reusable containers filled with your favorite products.
  5. Refuse unnecessary single-use items: Politely decline items like disposable airline blankets, pillows, or headphones, and bring your own reusable alternatives instead.
  6. Eat at eco-friendly airport restaurants: Support food establishments that prioritize sustainable practices, such as using locally-sourced ingredients, compostable packaging, or offering vegan and vegetarian options.
  7. Pack a reusable coffee cup or thermos: Avoid using disposable cups for hot beverages by bringing your own reusable coffee cup or insulated thermos.
  8. Offset your carbon emissions: Calculate the carbon footprint of your flight using an online calculator, and consider donating to a reputable carbon offset project to help mitigate your impact.
  9. Research eco-conscious accommodations and transportation: Choose hotels, hostels, or homestays that prioritize sustainability, and opt for public transportation, biking, or walking when exploring your destination.
  10. Practice responsible tourism: Be mindful of your impact on the environment and local communities, and follow sustainable travel practices such as minimizing waste, conserving water, and respecting local customs and ecosystems.

By incorporating these eco-friendly tips into your travel routine, you can reduce waste, save money, and contribute to a more sustainable future for our planet.

water bottle on a plane


In conclusion, it's both allowed and environmentally-friendly to bring an empty reusable water bottle through airport security and fill it up once inside the terminal. To ensure a smooth experience, follow these tips:

  • Choose an approved bottle type, such as stainless steel, hard plastic, or collapsible silicone.
  • Properly empty and pack the bottle in your carry-on bag, ensuring there's no residual liquid and screw tops are sealed shut.
  • Make a plan to fill your bottle after security, whether it's at a bottle filling station, water fountain, or by purchasing bottled water.

By following these guidelines and staying informed about the latest TSA regulations, you can confidently bring your reusable water bottle on your next flight, helping you stay hydrated and contribute to a greener, more sustainable world.