Z-Rack Whiteboard Marker Holder

After being inspired by Stanfords d.School "Make Space" book, We followed their instructions for creating a low cost whiteboard out of a garment "z-rack" with a few of our own changes.
This part was created to hold four white board markers on the side bar of the z-rack. The design was intended to be very flexible, allowing you to put the marker in right side up, or upside down if it is running low on ink.
Part Details:
- Fits standard whiteboard (dry erase) markers
The original d.School z-rack design:
http://dschool.stanford.edu/wp-content/uploads/2010/08/dschool_zrack-21.pdf