A pen that can use any liquid as ink - such as wine and juice - has been revealed. Called the Winkpen, the reusable device can suck up liquids and write on paper without the need for regular ink. It ...

I messed up! I cannot believe that I forgot to make a pen of my most popular video ever that has over 500k views!! So, I am going to more than make up for it with this fun prize-wheel-spinning 3 color ...

Patents for ballpoint pens go back to the late 1800s, but it took half a century to develop good, fast-drying inks. Bic, Pilot, and other makers jealously guard their formulas, but to get that classic ...