The main purpose of the case is to store and protect your glasses. The case can be closed with a threaded lid. The whole design is waterproof and ensures your case to float on the water surface when you travel by boat. The case is rugged enough to withstand the hardest impact when traveling by plane.

The inner diameter of the case is 51 mm, which should fit all common sizes of glasses. The tolerance between the case and the lid is 0.1mm. The case was printed on two different printers (BambuLab X1C & Prusa MK3) and the tolerance works just fine. The main layer height is 0.2mm. Variable layer height was set to on and is in the area of the thread set to 0.1mm.