Japan is all aflame over heat-not-burn tobacco products–from the same big tobacco companies who are hoping to market them globally soon. These battery-powered devices heat the tobacco to about 500 degrees F. (260 deg. C) producing an inhalable aerosol that delivers nicotine to the lungs without combustion. Are they safe? No one really knows. An early study found volatile organic compounds, polycyclic aromatic hydrocarbons, and carbon monoxide present in the smoke.
PositiveTip: It would be wise to avoid a product that is "safer" than the most deadly consumer product in the world–cigarettes!