To be fair, back in the day - I mean late 70’s - Dairy Queen would have plastic mugs you could get drinks in with the local high school logo/name on it. I’ve got a Sam Rayburn (Texan) left of the Pasadena ISD (Texas) schools I had.
I never remember them making a Deer Park (Deer) ISD (Texas), but would have bought a dozen.
very cool, for a root beer float