Designed for the 3M Classic earplugs. Fits up to height: 40 mm and width: 14 mm.

Keyring hole 4 mm diameter.

You may need to remove stringing on the threads in the lids (not sure why), and two supports.

Features:

Has a raised lip so it is much easier to screw on the cap.

Threaded on both ends, which makes it far easier to remove stuck earplugs.

Large threads for easy screwing.

Grooves on end caps for easier tightening/loosening.

Updates:

1: Changed the container to the proper version.

2: Added supports.

3: Straightened seam lines and added another thread support.