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 UC Davis study: Disposable vapes may be more toxic than cigarettes Disposable Vapes Release More Toxic Metals Than Traditional Cigarettes: UC Davis Study The Epoch Times New study finds disposable vaping devices more toxic than traditional cigarettes