I use the paper cups but I reuse my cup for a few days until it gets mushy.

So, what you are really apparently blithely saying is to proximately promote the spread of germs with a reused glass rather than avoiding it through single-use cups for the remote goal of "saving the planet"--whether or not YOU are actually saying this, I think this is the problem with a lot of the recycling mindset.

I use small plastic Solo cups which are recyclable.

I reuse those plastic medicine dosing cups that sometimes come with over the counter meds.

Very good ideas to reuse bathroom paper cups!