The only thing I have found that will not leak or flood is my cheap ViviNova...I just wish I could find one that produces a better flavor for my travel gear. I have tried kangers, cartos, a Russian 91, and a kraken with noooooo luck...just a juice filled pocket and a ruined shirt. Before this turns into a "don't vape on an airplane" thread, I already know that. I'm looking for advice from people with their own personal pressurized aircraft, pilots, or people that have noticed their set up hasn't leaked or terribly flooded. Also, I know about the tip it upside down or open it until altitude trick...it doesn't work 
Thanks for the advice in advance!

Thanks for the advice in advance!