The document describes Irn-Bru, a Scottish carbonated soft drink. It notes that only two people know the secret formula of its 32 flavors, which is kept locked in a vault in Switzerland. The drink contains carbonated water, sugar, citric acid, flavors including caffeine and quinine, and colors. Potential slogans are provided, but the writer decides not to use them and instead relate the slogan to their energy drink design featuring a light bulb. Font options are experimented with and analyzed for suitability relating to energy and catching attention from a distance. Packaging designs are also considered.