The SmokeGENIE Cloud Formula Fluid, used to refill SmokeGENIE and NINJA smoke machines, is a safe, odorless, and eco-friendly solution made from food-grade ingredients. This 100mL bottle provides up to 30 hours of fog on setting 1 and approximately two hours on setting 3, generating 200 to 240 minutes of total spray time on default power mode. The refill capsule, sold separately, holds 9mL of fluid, lasting about 15 minutes per fill. Made from food-safe vegetable glycerin and propylene glycol, this fog fluid is safe for indoor use around both humans and animals. It has a 100% SAFE certification from SGS and is whitelisted by the Actorâs Equity Association USA.