Menthol E-Cig Review of 21st Century Smoke Electronic Cigarette Starter Kit Menthol flavor 1.6% Nicotine Strength. The 21st Century Smoke® Electronic Cigarette Rechargeable Kit contains: 1 disposable Menthol Express refill cartridge with self-contained atomizer (cartomizer) 1 rechargeable battery 1-110 AC wall charger Each Menthol Express cartridge is comparable to approximately 2 packs of cigarettes. The […]