Sen-Sen
Sen-sen, marketed as a "breath perfume" is a type of breath freshener. In the early years of the twentieth century, before the health risks of tobacco were scientifically determined, Sen-sen was a commercial product that would "cover up" the smell of tobacco on one's breath and clothes at a time when there were just moral and personal reasons for disapproving of tobacco. Adolescent boys would use it, for instance, to attempt to hide from their parents the fact that they had been smoking. Thus did "Sen-sen" enter the list of moral faults caused by pocket-billiards in the song "Ya Got Trouble" in the musical comedy The Music Man. The product is mentioned in the Billy Joel song "Keeping the Faith." (I took a fresh pack of Luckies And a mint called Sen-Sen.)
Sen-sen is mentioned in the book "Their Eyes Were Watching God" and referred to as also covering not only tobacco breath, but 'liquor breath'. It also was mentioned in the book "A Tree Grows in Brooklyn" as Hildy O'Dair had used it.
In Europe, there was a similar product oriented towards female smokers, called tabac blond.