The summer before I went to college, I worked at a bank. This mug (below) was one of the ones in the staff kitchen/break room. I LOVED it. I thought it was the funniest thing I had ever seen. My colleagues were amused, I guess, and gave it to me as a going away present at the end of the summer.
Now it's chipped on the edge (which you can see in this picture) so we use it as a pencil cup, since it's not safe to drink from. But I will never give it up!!
And of course, there's this mug, from our honeymoon in St. Croix.