No, solid stick deodorant does not count as a liquid under TSA or international "3-1-1" rules for carry-on luggage. You are free to pack full-size solid sticks in your carry-on bag without placing them in a quart-sized clear plastic bag. This is a common point of confusion because gel, spray, roll-on, and cream deodorants are classified as liquids or "gels" and must adhere to the 3.4oz (100ml) limit. If your deodorant is firm and dry (like a traditional white or clear solid stick), it is considered a solid. However, if it is goopy, can be squeezed, or is a semi-liquid gel, it must go in your liquids bag. For 2026 travelers, switching to a solid bar or stick is a peer-to-peer "pro-tip" to save space in your limited liquid allotment for items like sunscreen and shampoo that don't have solid alternatives.