Halls is Cadbury Schweppes product. It has been around since the 1930's and has had various owners such as Warner Lambert and Pfizer. Despite having several flavors, one of the best-selling flavors is menthol because of "Vapor Action®". When could place the cough drop in your mouth, vapors go into your lungs and nostrils and relieve you of any congestion that you may feel.
This is specially useful when you have throat irritations or colds and cough. Also the good thing is that the amount of menthol is just right. It doesn't irritate you or have any medicinal taste. Also Halls has a very soothing and calming effect. It is nice to have when you need to settle down or after eating a meal. At only 6.5 cents per piece, this is a bargain.