Every porcelain coffee cup I've had I have dropped and shattered or else they have cracked. I don't like plastic. So, I decided to try an enamel cup, and they work just fine. I've dropped them. No big deal. As best as I can tell, they'll last about 1000 times longer than my now-deceased Dansk Bistro porcelain cups.
The best cups I have are two yellow enamel-coated metal cups out of Poland. Enamel-coated metal cups are very European and good luck finding them in the U.S.