The file 'Bottle Cap Ant Trap; Cap Insert 3D Printer Model' is (stl) file type, size is 39.1KB.
Made this for https://www.thingiverse.com/thing:1596676 because I didn't have any metal bottle caps. I added a skull to it and made it a ring to use minimal bait. Fits snug but not tight.
ant_bait_dispenser_bottlecap.stl | 167.5KB |