The EVOD is a bottom coil Clearomizer tank system which provides a nice warm vapor, with a superb clean flavor, and reduced wicking issues. The mouth piece is attached to bottom and provides flow constantly. The tank can hold 1.5ml of eLiquid. The eVOD is also ego threaded and compatible with all eGO batteries. The eVOD looks stylish and will satisfy both beginners and experienced electronic cigarette users.