Available separately from the innovative kit that resembles our lovable friends from the Antarctic is the Joyetech ATOPACK Penguin Replaceable Cartridge. With its holding capacity up to 8.8mL of e-liquid, these user-friendly cartridges are extremely easy to replace and refill. Each cartridge features a long window with markings along the side of it so you can tell just how much eJuice you have left to vape. For convenient storage, the side of each Replaceable Cartridge features a label that enables you to write down the brand, flavor, nicotine strength, and PG/VG ratio of the vape juice inside the cartridge. Constructed out of premium PETG and Silicon materials that are both heat-resistant and recyclable, you won’t have any reservations after making the switch to this eco-friendly alternative!