Case for the “High Fidelity Concert Ear Plugs” from Eargrace.

The earplugs come with both a carrying case and lanyard, but you can only use one or the other - the lanyard won't fit in the case (maybe if you really squash the earplugs in there).

This model is made up of two parts, where the lanyard is wrapped around the inner case and functions as a friction fit when placed inside the outer cover. To get the earplugs back out, simply pull the loop of the lanyard sticking out.

May very well work with other earplugs, but size is adjusted for the winding of the lanyard.

Printed in both PLA and PETG at with 0.4mm nozzle, 0.2 layer height, 15% infill and no supports - the parameters shouldn't really matter though as it's the lanyard that provides the tight fit.