No Chametz
Any food that rises during the cooking process is also prohibited. If there is a loaf of bread in the house, the occupants must remove all traces of it before Passover. That includes every last crumb. Those who strictly follow the Passover rules literally do not eat any chametz during the holiday. Coca-Cola must have been aware of this and decided to create a kosher version of the beverage.
Other Restrictions
Apart from chametz, kitniyot is also prohibited during Passover, though not all Jews are required to follow it. If someone does not have “Ashkenazi” (which means Eastern European) roots, they are safe. However, this only accounts for about a quarter of the world’s Jews. This means that many people still refrain from eating kitniyot during Passover. But what is kitniyot, and does it have any significance for Coca-Cola?