Innovative ballpoint cartridge holds twice as much ink, extends the life of your pen, and helps reduce plastic waste.
Efficient spiral ink cartridge for ballpoint pens designed by Kim Yeon-soo, Han Chi-hoon, Park Byong-gon, and Kim Sung-geun.
Also check out: 3D Pen and Color Picker Pen Concept
Silas
This is so clever! Why haven’t they implemented this before?
Apr 27th, 2016
Adam
Really brilliant idea !! (Keep up the good work)
One thing about to think it over: It would be better to use it for not a disposable/advertisement/single use pen. Because the pen’s (casing) life is generally shorter than the cartridge’s will.
Apr 27th, 2016
pTc
Because buying another pen at 40p has been such an issue before.
Apr 27th, 2016
iluvgert
Why don’t they just make the regular tube wider?
Apr 27th, 2016
Szymon
Why not make the thing wider?
Apr 27th, 2016
Steven
@ pTc: It hasn’t.
But the amount of plastic waste is still a huge issue… and will be for thousands and thousands of years!
Apr 28th, 2016
Swiper Fox
If you double its radius/diameter; you get 4x the volume of ink.
Apr 30th, 2016