Bols Triple Sec is a crystalline liqueur with orange peel flavoring Curacao. Bols triple sec is essential in the choicest liquor bars as the large number of drinks are. If you’ve had even the slightest experience with cocktail making (or cocktail drinking, for that matter), you’ve likely come into contact with the excellent Curaçao Triple Sec from Bols, potentially one of the oldest spirit brands in the world. Top quality stuff flavoured with orange peels, perfect for a whole host of mixed drinks.