DEAR MISS MANNERS: Self-service fountain machines at pizza parlors and delis have the different sugary sodas labeled with big buttons, while there are often smaller “water” and “soda” buttons below.

I believe that the aerated water dispensed by the “soda” button is still just water, meaning I can fill up a cup for free.

DEAR MISS MANNERS: Self-service fountain machines at pizza parlors and delis have the different sugary sodas labeled with big ...