Original & best. Sparkling flavoured soft drinks. The original IRN-BRU soft drink. BRU'd in Scotland to a seret recipe since 1901 To a secret recipe of 32 flavours with a Spirit that's as bold as its taste. You can't describe it, because there's nothing like it. The Strong Soft Drink An indescribable brand with a phenomenal taste. Throughout the years, IRN-BRU's irreverent and humorous advertising has continued to entertain and refresh fans up and down the country.