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 Study: (Non FDA Approved) Vapes Emit More Toxic Metals Than Cigarettes Tobacco Reporter Household Hazardous Waste Yolo County PDF) Disposable Puff Bar Electronic Cigarettes: Chemical Composition and Toxicity of E liquids and a Synthetic Coolant