Herons and Spheroids for air travel ...!
I don't think the Ziploc bag will work. Even if it's a closed system it's not rigid enough to be resistant to pressure changes. Leaks will continue to happen based on experience...
I agree that the ziplock bag does not work, however the last couple times I flew with the Kayfuns on a Provari, I turned it upside down(entire unit) and zero leaks!! Both tanks were about half full of juice. The spheroid had zero leak in my front pocket....thank goodness!!
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