JoyeTech continues to provide us with the most innovative, up to date products on the electronic cigarette market. The JoyeTech Cubis Sub Ohm Tank is designed to do everything through the top of the tank. Allowing you to avoid any messy liquid spills or coil mishaps. The Cubis Tank allows you to fill with liquid as well as change the coils via the top of the tank. It is also designed with a hidden airflow control that allows you to customize your hit to perfection.