The type of deodorant you can pack in a 2026 cabin bag depends on its consistency. Solid stick deodorant is the most traveler-friendly option because it is not considered a liquid by the TSA or international security agencies; you can bring a full-sized stick in your carry-on without any size restrictions. However, spray, gel, roll-on, and cream deodorants are classified as liquids or aerosols. These must comply with the "3-1-1" rule: the container must be 3.4 ounces (100ml) or less, and it must fit inside your single, quart-sized clear plastic liquids bag. In 2026, security staff are strict about the container size, not the amount of product left inside; a 5oz spray can that is nearly empty will still be confiscated. If you want to avoid the hassle of the liquids bag entirely, switching to a solid stick for your flight is the most efficient choice for 2026 air travel.