rn cola

When a nurse at the end of their shift, still in scrubs/uniform walks into a RaceTrack or Quick Tripp and the attendant comps their fountain drink.this is RN cola!

I went up to pay for my drink and they laughed and said their ain’t no charge for that RN cola. (Texas)
I went to pay for my drink and they informed me that there was no charge for RN cola. (everywhere else) RN SODA