New premium quality fog juice in 4 liter container, high quality Fog Juice is made from water based high grade pharmaceutical ingredients, each approved by the FDA. F4L Premium Fog Juice produces thick, billowing white clouds of smoke when used with American DJ Fog Machines (may be used in other water based fog machines as well). By using F4L Premium Fog Juice it increases the visibility of light beams and colors of your special effects lighting and helps create an exciting atmosphere.