The Green Zero Smoke Blaster is a ray gun that shoots smoke rings up to 12 feet. The Zero Smoke Blaster uses the same liquid that Hollywood uses in the movies to make special effects fog. It is safe and non-toxic, it comes with a water based fog liquid that you pour into the gun and blast away. The Green Zero Smoke Blaster has an elastic diaphragm that pushes a burst of air through a small opening. The fog ring is a rotating toroidal (donut shaped) vortex (whirling motion of air with a low pressure area in the center).