EDITED: I guess the web address on the business card is not correct so here is the direct link here:
which is: www.tips4markers.blogspot.com
I took the day yesterday to play with them and update some of my beat-up Blender Pens:
All you need is a pair of needle-nose pliers to pull off one end. See the little black pieces sitting next to the business card? That's what I pulled off. I then removed all of the tips and threw them away.
I added the new tips, plus two that were okay, into my bowl which had a "Blender Pen Refill" recipe that I made myself. I then added the "straws" that sit inside of the Blender Pen into the bowl also. After a while, I flipped the straws so that other ends were soaked.