When you're packing, remember to limit anything liquid-y to 3.4 ounces (100 milliliters) or less and to place those items in a clear, quart-sized plastic bag, one bag per traveler. Think the usuals, like shampoo, toothpaste, and aerosol or roll-on liquid deodorant (solid deodorant isn't regulated by the 3-1-1 rule).

Whether deodorant falls under the TSA's 3-1-1 liquids rule in 2026 depends entirely on its physical form. Solid stick deodorants (the firm, waxy type) are not considered liquids or gels and are therefore not subject to the rule; you can bring a full-sized solid stick in your carry-on without placing it in a quart-sized bag. However, gel, spray, roll-on, and cream deodorants are all classified as liquids or aerosols by the TSA. These items must be in containers of 3.4 ounces (100ml) or less and must fit inside your single, clear, quart-sized plastic bag alongside your other toiletries. Aerosol "body sprays" are also subject to this rule and must be travel-sized. If you are unsure about a specific product, the "squish test" is the best guide: if you can squeeze it, spray it, or it has a jelly-like consistency, it must follow the 3-1-1 guidelines. To avoid any hassle at security, many frequent flyers have switched to solid sticks or "deodorant wipes" which are completely exempt from size restrictions in carry-on luggage.