I wanted a waste disposal method that didn't attach to the printer itself because my printer bench is in a corner and pretty cramped. Every time I had to move my printer to get to the back of it (which happens far more often than I would've thought) I kept having to wrestle with the waste disposal attachment. So I made this trough (basically a rain gutter with more sloping angles) and attached 3 inch flexi hose ($14 at my local Lowes in the same display as where you find the clothes dryer vent ducts) but the OD of the downspout is .8mm narrower than the ID of a 3" schedule 40 PVC pipe so that should work also if you'd rather go with a rigid spout (which was my first inclination until I saw the flexi hose and thought “well heck, this is WAY easier! And they're about the same price.”) I added a little stem to the side of mine because it helped stablize it a little bit. The stem is just a primitave I added in the slicer at time of print. I have a TERRIBLE time with supports getting knocked over so I printed this at a 45deg angle to minimize supports so that they're only needed at the bottom to hold the angle.

I tried this in Overture flat brown PLA but it was too soft and flexable to actually hold itself up by the lip that attaches to the desk. I wound up printing it in Hatchbox ABS. I got a little bit of warping because of the large unsupported faces but all-in-all it was “good enough." It's handling printer poop not displaying jewelry after all so it doesn't need to be perfect.