I just got back from France. I did have an issue with leaks from flying. I had a spare eroll in my carry on bag filled with juice in sealed in a Ziploc bag. The juice leaked out of the tank on both flights. The eroll in my pocket was fine, just the spare in my bag in the overhead bin. Must have been shaken up more in the the overhead bin. I had extra pre-filled tanks in the same bag and those were fine. Just an FYI if you are flying.
