Coca-Cola No Sugar contains no preservatives while Coke No Sugar post mix contains the preservatives required. RELATED LINKS How many kilojoules in a can of Coke? What was the ‘Share a Coke’ campaign? Will Coca-Cola No Sugar replace Coke Zero? What happened to Coke Life? Do Coca-Cola Cans and Bottles Contain Bisphenol A (BPA)?