New study finds disposable vaping devices more toxic than traditional cigarettes Disposable vapes are more toxic than cigarettes, contain lead: Study Nicotine vape devices are now accepted for safe disposal at the @Iowa City Landfill & Recycling Center's Hazardous Material Collection Facility. Vape devices contain toxic nicotine and lithium ion batteries. Improper disposal of UC Davis study: Disposable vapes may be more toxic than cigarettes