I fly a bunch and always have a full tank ready for when I get a quick second to taste some goodness. I found my setup would leak something awful as the plane changed cabin pressure. My fix, and it works really well (sorry drippers), it to put one of those taster condoms you get when trying new juice at the shop over my drip tip and rest my vape upside down in the seat pocket. No more leakage and I dont find little pieces of pretzels in my drip tip. I have to admit, a nice stale piece of salty pretzel does mix nicely with my caramel but is otherwise really gross. Hope this helps at least one traveler. Thanks.