The FDA is allowing vaping brand Juul to keep its e cigarettes on the market. Studies from Juul show its e cigarettes are less harmful for adult smokers, who can benefit from switching completely Juul will pay nearly $440 million to settle states' teen vaping probe : NPR How Juul Became A $15 Billion Giant How Many Puffs in a Juul Pod? A Guide to Flavor and Longevity Inline Vape LLC Arrival of 'Apple of vaping' raises fears a generation will be hooked What Happened To Juul Founders Adam Bowen And James Monsees?