This is a simple spool holder. Nothing fancy but it works well. The spool lays on its side on the holder. It is cone shaped so that there is little surface contact between the spool and the holder allowing the spool to be uncoiled without alot of effort.

I printed a couple of these using 0 infill and 0 solid layers which makes it light and hollow. I use about 10 perimeters and a low layer leight also use a raft if you can. A fan is helpfull when it gets closer to the top to cool the part.