We recommend referencing the comprehensive list of items prohibited by TSA: http://www.tsa.gov/travelers/airtravel/prohibited/permitted-prohibited-items.shtm.   Allo is safe for travel, but most airlines restrict the use of vaporizers. Exposure to extreme altitude changes during flight may cause slight leakage in the Allo pods, especially if they are partially used. We recommend disposing of partially used pods before getting on a plane and using a fresh one when you land. If your Allo pod leaks, avoid direct contact with the liquid; however, if you get liquid on your hands, simply immediately wash the area with soap and water. You may continue to use the Allo pod if some liquid has escaped, but carefully wipe the juice off with a clean cloth or tissue before inserting into your device. If leaking persists, please contact the Allo team at support@allovapor.com