Vaporesso adopts dual child locking mechanism that prevents children from accidental open the tank and get contact with the e-liquid inside. It is truly carefree filling since the coil would remain inside to avoid overfill. With its unique leak resistant structure, you will be rest assured to enjoy the vaping with clean hands. Guardian Tank is also a perfect combination of Direct to Lung and Mouth to Lung settings. Built with CCELL ceramic coil inside, it is guaranteed to deliver the most original flavor of your e-liquid. Guardian tank, the safer tank to vape with!