UP! Plus 3D Printers usually needs filament that are on a plastic spool. The problem is most filament supplies do not sell filament with the expensive spools that are thrown away after use.
So we decided to make a small filament roll holder that will bolt straight onto the UP! Plus printer. The printable files can be downloaded from Thingivers.com – http://www.thingiverse.com/thing:32279
It works really well… 
We are constantly uploading more designs so keep an eye on our Thingivers profile.
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Very interesting