This tabletop funnel lets you bag or sort small items. Slide it onto your table edge, make small piles of items (or maybe create a sorting tray with one open side), and then slide a desired number of items along the tabletop onto the funnel and into a ziplock bag.

Print using any material, in upright position. PLA might creep over time, so maybe rule that out. Use supports for the top edge of the slide -- I couldn't figure out how to avoid them. If the fit is loose, apply a single layer of PVC (electrician's) tape on the bottom table lip.

The provided 3mf file is for a 33mm thick tabletop. You can adjust that in Fusion 360 (Go to Modify → Change Parameters) to fit your own table.