The O:pen is a simple but effective pen by the designer Lars Zimmermann. It comes with a special circular skill: Regular pens are usually designed for one type of refill. O:pen connects to all available refills; reuse made easy.
↓ makes *
- “It happened to most of us: Our favourite ball point pen is suddenly out of ink. We search for another ball point pen to swap the refill. Only to discover: the refills are different. The new one does not fit. Well if PenOpen is your favourite pen this won’t happen again.”
- Above you can see a picture where a cap is added. The cap is just a small piece of silicone tube. The cap is not part of Trikkas parts catalog.
- Please visit the original post by the designer to learn more about Penopen and how to make it and to see iterations of it. Initial post backup.pdf
- Pictures by Mifactori, CC-BY-4.0