Juul is back to its original mission with a second generation e cigarette Study: Juul Pods Contain Caffeine. What's It Doing There, And What Does It Do? Hawai'i Public Health Institute Juul, the vape device teens are getting hooked on, explained Vox FDA approves Juul's tobacco and menthol e cigarettes Reuters Juul has stopped selling all fruity flavors Column: A tobacco company makes Juul's founders billionaires while questions rise about their product's safety Los Angeles Times