Bitter cocktails are on the rise. As a reminder, bitter refers to an aperitif liqueur obtained from the infusion of bitter plants such as bitter gentian, quinine or sour orange (bitter orange). Originally, it was used for therapeutic purposes. But today, bitters are used in the preparation of many cocktails in order to add bitterness and flavor the drinks. This is the case of Manhattan and Mojito bitters. If you want to learn the art of mixology, you will need to know the usefulness of the dash bottle and the vaporizer .