My second son, Gabe, recently had to get glasses, just like his Dad. But, like any child, he has a hard time keeping track of them. So I build a case for them that he can keep with him wherever he goes, clipped to his hip.
The files can be downloaded on Thingiverse, but if your glasses are a different size than my sons you’ll have to modify the files in Blender.
And if you don’t know how to use Blender I know of a good resource for learning that’s almost ready.
