I ordered these on the off chance that I actually did end up collecting a large amount of items that I'd like to put on display, but I will not be using these for the cups. The cups this company provides are actually really good, and I want to use them in daily life. Locking them inside of a plastic casing just seems counterintuitive to that fact.
However, that's not to say that these don't have good purposes.
I've actually been starting to use them more to hold 3D prints that I make as a display case almost.