The Nano Penholder is a truly exceptional item that you simply won't be able to leave alone. It features a spectacular innovation called "Nano-Techonology". The Nano Pen Holder is filled with two liquids, a transparent oil and a black ferrofluid which contains magnetic nano parts of 10 nanometers (1 Nanometer = 0.000001 Millimeter). Remove the pen from the holder, and the ferrofluid is released into the surrounding liquid. By putting the pen back into the holder, the black magnetic liquid surges upward, drawn towards the metal tip of the pen. A true conversation starter that will have your advertising viewed numerous times daily! It includes one two toned metal pen, and will also work with any appropriately sized, metal tipped pen. Packaged in a white gift box.