Cointreau is a form of triple sec produced by the Remy Rémy cointreau distillery In. France this liqueur is usually viewed as a premium triple, sec and it may be sipped as a standalone beverage or blended into mixed. drinkshis liqueur is usually viewed as a premium triple sec, and it may be sipped as a standalone beverage or blended into mixed drinks. Many bars stock Cointreau, and it is also available through liquor stores in many regions.