As the saying goes, you only ever need one bottle of bitters per marriage. If that's true, Fee Brothers has been promoting the divorce rate for four generations and the recipes of its house bitters are closely guarded secrets. Bitters are, as their name suggests, a bitter or bittersweet type of spirit made from different herbs, roots and plants. Bitters are used to flavour and add a dry zest to cocktails and cooking. Because of their function as a digestive aid and appetite stimulant bitters are often used in before and after dinner cocktails (aperitifs and digestifs). Four of their bitters are available on the New Zealand market: old-fashioned Aromatic Bitters, Peach Bitters, Mint Bitters, and Orange Bitters. The old-fashioned is used the same way as any Classic bitters.