Taking deodorant in your hand luggage in 2026 depends on its physical form and the specific airport's security equipment. For stick (solid) deodorant, there are no volume restrictions; you can carry a full-sized stick without placing it in a clear bag. However, spray, gel, or roll-on deodorants are classified as "liquids or aerosols" and must comply with the 3-1-1 rule: they must be in containers of 100ml (3.4 oz) or less and fit inside a single quart-sized clear plastic bag. At many major UK and EU airports now using CT scanners, you no longer have to remove these items from your bag, and some terminals have even increased the limit to 2 liters. However, for most international travel (especially in the US), the 100ml rule remains strictly enforced. A "pro-tip" for 2026 is to switch to a solid stick or a "deodorant balm" for travel, as it eliminates the risk of leaks and bypasses the liquid security screening entirely, saving you space in your limited quart-sized bag for items that must be liquid, like toothpaste or sunscreen.