Spiral Ballpoint Pen
Bike-powered sewing machines, the secret iPhone tracker and eggshell carvings in this week’s look at the web
Designers Han Chi-hoon, Kim Yeon-soo, Park Byong-gon and Kim Sung-geun collaborated on a new ballpoint ink cartridge in a spiral form, an innovation that holds twice as much ink as a traditional pen.
COOL HUNTING always gets permission to use the images we publish; however, as an independent publication, we cannot afford to continue fighting unfair claims of copyright infringement, so the images have been removed from this post.
Via instructables.com link opens in a new window
