I recently bought some colored 3D Printer filament for my projects. The filament spool did not fit on the MakerBot Replicator that I have access to, so I built a spool stand using PVC pipe. This design holds the spool at a height that allows the filament to come off the spool easily and go up into the Makerbot's tubing that guides the filament into the extruder.
Construction is easy: it just requires cutting some PVC pipe into specific lengths and assembling the pieces as shown in the third and fourth photos. Best of all, the cost is minimal: all of the parts required cost $6.
I made this at TechShop