Provided are systems, methods and electronic vapor devices comprising a first container containing a first vaporizable liquid and a second container comprising a second vaporizable liquid. A vaporizer can be configured to vaporize at least the first vaporizable liquid and the second vaporizable liquid. Vaporizing the first vaporizable liquid produces a first vapor having a visible vapor cloud, and vaporizing the second vaporizable liquid produces a second vapor having a drastically reduced or invisible vapor cloud when compared to the first vapor.