Originally Posted by You
Years ago when I lived in Boston sodas were called tonic. Don't know if that is used much back there today.
Yes, has not changed. What anybody else calls "soda" or "pop" is still "tonic" in eastern Massachusetts.
Also, in eastern Massachusetts, a "milkshake" contains only milk and syrup. If you add ice cream to it, it's called a "frappe" (pronounced "frap").