Our one son went to Disneyland in CA a few years ago and got DH and I matching Mickey/Minne Mouse cups. I mainly use that one.
But a more funny "cup" story. DH's brother, Milton (who passed away a few years ago) had a favorite coffee cup. And NO one (seriously) was allowed to use his cup.
One time some family members had stopped by and one of them grabbed Milton's cup from the shelf, poured coffee in it and had it on the table. Milton came in and saw it and got upset and took it away, and got another cup for the family member. He more/less told them that no one used his cup whether he was there or not.
And after he died, we took his cup off the shelf and its now in a display of other "Milton" things - no one will use his cup