School the same time the most expensive thing is pen, especially in the intensive examination, almost a week have to replace it with a pen, write the words because too many children. Designer Han Chi-hoon, Kim Yeon-soo, Park Byong-gon, Kim Sung-geun think of this idea to the classic, why pen have to be straight? They will be designed to screw the barrel style, is the actual length of the pen tube is doubled, which which the ink is doubled, so that the same pen can be used longer.
Via: www.likecool.com
You can use the pen longer
26 Apr