PDF) Disposable Puff Bar Electronic Cigarettes: Chemical Composition and Toxicity of E liquids and a Synthetic Coolant Your Vape Pen Might Be Full of Lead 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 They may look harmless and smell sweet but disposable vapes can release toxic metals at levels even worse than cigarettes. A UC Davis study found lead, nickel, and antimony inside Potential health effects of electronic cigarettes: A systematic review of case reports ScienceDirect Lead in Vapes: Toxic Metals Found in Disposable E Cigarettes Technology Networks