St. This vaping device, called a JUUL, might look like a USB drive, but it contains nicotine and other harmful chemicals. Alarmingly, this easily hidden device and its enticing vapor flavors, like Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times Cell specific toxicity of short term JUUL aerosol exposure to human bronchial epithelial cells and murine macrophages exposed at the airliquid interface Respiratory Research Springer Nature Link Non Targeted Chemical Characterization of JUUL Virginia Tobacco Flavored Aerosols Using Liquid and Gas Chromatography Chemicals In Juul Pods Juul wanted to revolutionize vaping. It took a page from Big Tobacco's chemical formulas