This very simple spool holder bracket was designed to hold my filament rolls, by mounting a length of 20mm HDPE pipe, inside a plastic box (to protect the filament from moisture). I went for this design because it was simple, and used HDPE pipe that I had laying around, which is nice and low friction, so we had been using it as a dodgy pipe support when we first got the printer running. I have included designs for open or closed brackets. The open bracket allows you to take the spool out without unbolting the brackets. Accepts up to 21-22mm diameter pipe/rod, and uses M5 mounting bolts.Simply print two of these brackets (either open and/or closed design), and mount inside a container of your choice, supporting a length of pipe or dowel that has been cut to suit. Bolt to your container using M5 bolts.