I particularly use several cups for my coffee, but my favorite is this one because it has a sentimental value, it is a gift from my love. I don't allow anyone else to use it so they don't break it, that's why every time I have a family visit I tell them, I'm sorry, you will NOT drink with this one.
I always set limits whether with family or friends, it's the only way to avoid bad moments because mugs are breakable objects and even more so when other people are not so careful.