Sen-Sen is a type of breath freshener originally marketed as a "breath perfume" in the late nineteenth century by the T. B. Dunn Company, currently produced by F&F Foods. Sen-Sen bears a strong resemblance to Vigroids, a liquorice sweet made by Ernest Jackson & Company Ltd.
Sen-sen can be purchased today, usually in small packets. Previously it was available in more convenient small cardboard boxes. Similar to a matchbox of the time, an inner box slid out from a cardboard sleeve revealing a small hole from which the tiny Sen-sen squares would fall when the box was shaken.
Sen-sen's current ingredients are licorice, gum arabic, maltodextrin, sugar, and natural and artificial flavors.