Question

how should clean cups be stored?
right - side up
upside - down, on a clean, breathable surface
neither

Explanation:

Storing cups upside - down on a clean, breathable surface helps prevent dust and debris from entering the cup and also allows any residual moisture to evaporate, which is important for maintaining cleanliness and preventing mold or bacterial growth. Storing them right - side up can collect dust and other contaminants inside the cup.

Answer:

Upside - down, on a clean, breathable surface