Whether you can pack deodorant in your hand luggage depends entirely on its physical form. Solid stick deodorant is not considered a liquid and has no size restrictions; you can carry a full-sized stick in your carry-on or checked bag without issue. However, gel, spray (aerosol), and roll-on deodorants are classified as liquids or gels by the TSA. In your hand luggage, these must follow the 3-1-1 rule, meaning they must be in containers of 3.4 ounces (100ml) or less and fit inside a single quart-sized clear bag. In checked baggage, you can pack full-sized versions of these products. For aerosols in checked bags, the FAA mandates that the total quantity of all medicinal or toiletry aerosols per person cannot exceed 2 kg (70 oz), and each individual container must be 0.5 kg (18 oz) or less, with the cap securely attached to prevent accidental discharge.