Unspooled filament holder

This is a pretty crappy design for a thing to hold loops of unspooled filament, complementing http://www.thingiverse.com/thing:300841

I made this because when I ordered my printer, I was too cheap to buy a whole 1Kg spool and got 500g of PLA unspooled instead. So for a while now I've been printing with a few loops of PLA hooked over the vertical rod. Now that I feel confident enough to make things to improve the printer itself, _achim_'s filament guide comes in handy, but I wanted something t