Under the current 2026 TSA guidelines, you are allowed one quart-sized, clear, resealable bag for your liquids, gels, and aerosols in your carry-on luggage. This is known as the 3-1-1 rule: 3.4-ounce (100ml) containers or smaller, 1 quart-sized bag, and 1 bag per passenger. While you can carry multiple empty resealable bags for other uses (like snacks or protecting electronics), you can only have one that contains your liquid toiletries. For 2026 travelers, it's worth noting that many major airports have now installed advanced 3D CT scanners; at these specific checkpoints, you may be told you can leave your liquids inside your carry-on rather than placing the bag in a separate bin. However, the limit of one quart-sized bag of liquids per person remains the global safety standard for all commercial air travel.