Deconstructing contemporary disposable vapes: A material and elemental analysis ScienceDirect 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 Up in smoke: Considerations for lithium ion batteries in disposable e cigarettes: Joule 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.