The Yocan Evolve Plus vape pen has a larger battery and atomizer coil than the original Yocan Evolve. The Yocan Evolve Plus series also features a built-in silicone container at the bottom of the battery so you can store your materials conveniently and discreetly. These vape pens also use Quartz Dual Coil (QDC) Technology for smooth flavor. These coils also have a Functional Coil Cap to prevent messy leaks.