Especially in the public restroom where I don't have a direct access to sink, getting the cup dumped and cleaned, washing hands and putting it back in can be quite a challenge and takes a premeditated planning.
Not exact matches
But one place I'm a bit of a germaphobe: Changing stations
in public restrooms,
especially those on airplanes and at airports.
Having a changing table available is pretty necessary
in a
public restroom,
especially if it's a place that families can and do frequent.