Pen Core / ballpoint

In daily life, almost all penstocks are discarded when the ball pens are exhausted, it’s really waste a lot.
The original idea of ‘Pen Core’ is from ‘no waste’. The traditional ball pen is designed into a new no-barrel one, the whole body of which is a spiral line, saving the barrel and extending the refill.
When “Pen Core” is produced, the tail part of it can be made into some interesting shapes.
Pen Core is a design which simplifies the ball pen structure, saves producing materials and provides fun for users.