Sharpie the pen makers have created a Liquid Pencil that contains an “ink” made from liquid graphite. Its liquid graphite "ink" allows the user to erase at will for up to three days. After three days the liquid graphite will then turn to ink and will become permanent, to a degree. Cool! The Sharpie Liquid Pencil($5) will hit stores in September, pack of 2 pens with 6 erasers for $5.
