Summary

Basic reusable but comfortable earplug using little plastic (~1g for several) and basic earbud tips, printable in few minutes on even the most basic printers

DO NOT IT IN YOUR EAR WITHOUT THE TIP OR YOU MAY NOT BE ABLE TO TAKE IT OUT

I planned to do experiments with some air holes but at this scale small holes dont seem to print well, there experimental models are in the FreeCAD project file