What's in an E Cigarette? American Lung Association Construction of electronic cigarettes Wikipedia Vaping identity realistic composition with editable advertising text and images of vape devices with refill liquid vector illustration Stock Vector Image & Art Alamy E liquid composition Vaping Post E cigarettes, aka JUULs and vape pens, use a battery to heat up a special liquid into an aerosol that users inhale. It's not just harmless water vapor. The "e juice" that fills the