A nature-sensitive way of renewing old markers.
Over many flips, marker nibs wear down, depending on who uses them and how. These nibs make it possible to turn an old marker into a new one without throwing the old one away.
Please note that the nib itself holds a huge amount of ink, so unlike regular refill, you may need to inject 2 or more batches of ink from the refill bottle (1 batch = 1 full refill cap).
My suggestion would be to include instructions/hints about removal of old nibs and how to make the nib soak the ink.
An instruction can be found in our blog. :-)
New life in an old marker
The BigOne works hard on facilitation courses not surprisingly the nib wares off after a 100 posters or so the replacement nib is amazing feels just like a new marker! I wait until my marker is empty before replacing the nib this way is a fresh nib and fresh ink all in one go!