The tip is a metal alloy that is slowly left on the page. It's not actually "infinite" -- it's more like "you'll probably lose this before you wear down the so

The tip is a metal alloy that is slowly left on the page. It's not actually "infinite" -- it's more like "you'll probably lose this before you wear down the solid metal tip." I wouldn't trust it as my only writing instrument on a mission to Mars. There are other brands on Amazon already; this is a refinement of the idea (purportedly less toxic chemicals involved) and not a completely new concept. Review of this model: http://www.smithsonianmag.com/ist/?next=/innovation/inkless-pen-lets-you-write-forever-180949737/ http://www.smithsonianmag.com/ist/?next=/innovation/inkless-...