If you are fortunate enough to have purchased one of the sturdy and reliable feeders from Super Feeder, and also purchased a hopper to go with it, you may find this simple funnel helpful for refills. Printing with the wide opening down will result in a good finish without using supports. You can also use your slicer to shorten or lengthen the narrow part of the funnel, for instance if your hopper is built into an enclosure and you need more downward reach. If printing in PLA, consider finishing with a couple light coats of water-based polyurethane for better durability.