"My cup runneth over," says the holy book. Meaning: I have more than enough.
Here is the part where this slightly silly (but not facetious) piece about a mug that grants you free refills begins to point to something deeper.
When I look out on the world I see more than enough for everyone. Some people have not just more than they need but more than they could ever possibly use. And some people have nothing.
No one's cup should go empty. There is more than enough for everyone. Everyone's cup (well, mug) should runneth over.