The Green and the Brown: A History of Conservation in Nazi Germany , Cambridge University Press, ISBN 978-0-521-84819-0
Soft-flame lighters (like a standard Bic) and wooden matches are usually allowed in your carry-on
These compact battery-powered devices have a removable pod on top, which serves both as the e-liquid reservoir and the mouthpiece
The provision was effective until September 30, 2024, and has yet to be renewed in a spending bill as of October 2025 and has so far done so
Keep in mind, however, that your usage habits may change
(I am not interested in rants or opinions, I want facts.) Interesting discussion and post, although I admit I think the science is lacking, which is where my question comes in