Most young users put disposable e cigarettes in trash, creating huge streams of toxic and hazardous waste, as companies fail to take responsibility Vapes are harmful and can be highly addictive. Some disposable vapes have nearly tripled in nicotine strength in the span of only 5 years. UC Davis study: Disposable vapes may be more toxic than cigarettes Disposable vapes might look harmless with their fun colors and sweet flavors, but scientists have just uncovered a disturbing truth: these devices can pack a toxic punch even stronger than regular cigarettes.