Alphabet D Mugs Online | Initial Letter Mugs: Okay you know D right. D is DON. And we know you are no less. So for all the Dons right there. This one is for you. The alphabet D coffee mug is painted with bright colours and can be gifted to anyone whose name starts with a D and will also look good if used as a letter in a sentence or word made of coffee mugs. The mug will surely Don your shelves.