So I just figured I'd share this info with anyone who may be wondering, as a few weeks ago it was me wondering. I recently PCSd to japan from the states and I probably had a combined total of 200 ml of juice. I kept a 30 ml bottle in my carry on and threw the rest in my checked bag. When I arrived there was no juice missing and I did have a note that said they searched my bag. Also when traveling through the TSA check points they never once asked about my ecig. In fairness though they may have been distracted by my cat who was traveling with me. Lastly I remember reading people saying their devices were leaking once the plane pressurized but I may have been lucky because I never once had this happen to me