As a youngster in the early 1970’s, my family lived in the suburbs of Boston for a few years.
I walked into a cafeteria-style restaurant in Boston, and I saw the word TONIC on the large movable-type menu hanging high on the wall. I had no idea what to make of “Tonic.”
It sounded like some sort of home-made medicine that Granny gave to Jethro on “The Beverly Hillbillies.”
Eventually, I found out that “Tonic” was soda.
Don’t care what it says, I speek Pittsburghease. And proud of it.
Does sound rather medicinal or something you would put on your hair.