The lil HYBRID cartridge consists of a capsule with liquid and a built-in heating element in the form of a spiral. When puffed, the liquid from the hearth enters the wick and is converted into steam upon contact with the heating element. Each pod contains 1.3 ml of liquid, consisting of water, flavoring, glycerin and propylene glycol. All liquids in lil HYBRID cartridges are nicotine-free. Nicotine gets into the aerosol from the Mix sticks. Pods for lil HYBRID are disposable and are designed for approximately 20 sessions (one pack of sticks).