This is a glasses case with print-in-place hinge.  It keeps your glasses secure even when open. 

The example images show “oversized” reading glasses from amazon.  The inner length is 148mm. The hinge friction will keep the lid closed, but the model could be remixed to put magnets on the sides to keep it shut.   

Smaller reading glasses might need a smaller version, but scaling might be an issue due to the 0.3mm gap used in the print-in-place hinge. 

If you want to add text to the top you can in set words to the bottom of the lid and it should work easily.

Example print printed at. 0.3mm layer height on a Prusa mk3s+