Vape Waste 2 Turns out the disposable nicotine delivery systems are, as suspected, worse than the real thing, according to a new study from researchers at UC Davis. Up in smoke: Considerations for lithium ion batteries in disposable e cigarettes: Joule A new study from UC Davis found that disposable vapes have much higher concentrations of heavy metals like lead and nickel than traditional cigarettes. CBS Evening News Facebook Deconstructing contemporary disposable vapes: A material and elemental analysis ScienceDirect