I threw this away a few days ago. It was a Pizza Hut Star Wars promotional item from 1979, during a re-release of the movie.
I remember having more than one of these cups, and using them in our kitchen, but at some point not long after we got them I started using this one as a water cup for painting. I used it while paining pictures, and I used it for painting figurines, and I kept using it through high school and college. I must have used it from time to time since college, too, but in recent years it's mostly been in a box, saved for sentimental value.
It was encrusted with layers of dried paint-water on the inside; the lettering had mostly faded on the outside; and the plastic was brittle. I did some garage de-cluttering over the weekend to prepare for Christmas, and decided it was time to say goodbye. Goodbye, Ben!
And then I went and saw the new Star Wars movie, which was good.