Liqueur Mastiha Castro. The Liqueur Mastiha Castro accentuates the superb distinct aroma and the smooth refined taste of the Mastiha. It is predominantly drunk after a hearty meal as a digestive liqueur (digestif), straight or on the rocks as a regular drink, chilled in small glasses, with soda or fresh fruit juice, in coffee, chocolate or tea, or combined with citrus fruit liqueurs, such as: Bergamot Castro, Mandarin Castro, Grapefruit Castro, or with herbal liqueurs, such as Sage Castro, or with Sour Cherry Castro liqueur, or in cocktails.