Flavored tobacco sales restrictions and e cigarette use among California high school students Can Vaping Cause Lung Cancer? Here's What We Know The Lung Docs PDF) Disposable Puff Bar Electronic Cigarettes: Chemical Composition and Toxicity of E liquids and a Synthetic Coolant A new study from the University of California, Davis, reveals that popular disposable vapes from brands like ELF Bar, Esco Bar, and Flum Pebble emit more lead than smoking 20 packs of What's inside a vape?