Will the Citrus Spritz line remplace Cointreau L'Unique?

No, this product will not replace Cointreau L'Unique. It contains our classic l'Unique , but premixed with French white wine, and all natural flavors and juices in a ready to serve format ideal for daytime occasion. 
Cointreau L’Unique remains our orange liqueur, essential ingredient of the original margarita for bartenders worldwide and you will find it in your usual stores