This is a model for the base of an upright stand for Bambu filament. The inner diameter is 43 mm, which fits a 1 ¼" PVC pipe snugly. With a 2' pipe, it can fit 8 filament reels. I spray-painted the pipe gold because it looks nice with the color I printed it in, but you could just leave it white.

I designed this as a way to store filament where I can see where each color is and be out of the way. The bottom reel fits around the extruding part of the base, so it stays stable.

Getting the filament off is easy, I just take pairs of two off at a time. I store it in a gradient pattern, just to keep it looking nice. I use clips that are contained in the reel, but using ones that go off the side would work too.