This smoke liquid is a consumable for the SmokeGENIE and lasts an average of 2.5 hours (with non-stop use on setting 3). Among the optional accessories you will find the complete SmokeGENIE kit. Standard included is 1 bottle of smoke liquid of 100 ml. You fill the capsule (see optional accessories) of the SmokeGENIE with this smoke liquid. 9 ml of SmokeGENIE liquid fits in a capsule, enough for an average of 15 minutes of smoke production. The smoke liquid is made of food-safe, vegetable glycerin and propylene glycol. It is safe for humans and animals to inhale the smoke in indoor spaces.