Pen-style electric cigarette with screw-on cap with clip over the mouth piece. Looks and feels like a real expensive pen. Complete stealth. Not even your mother will suspect to be an electronic cigarette. The latest generation refillable cartomizer is completely maintainance-free electric cigarette. Thick, milky esmoke every time even when puffing on it in quick succession. No wonder it is the hottest selling, one of the most popular e cigarette on the market.