Everyone knows that Coca-Cola is capable of doing crazy stuff. However, few people know what happens if you mix Coke with Milk. Although their chemical makeups are completely different, they react in an epic way.
Do you want to know what happens? Coke contains phosphoric acid molecules that attach to the milk molecules and make them heavier. As a result, these sink to the bottom, while the lighter ones float to the top.
In other words the acid in Coke curdles milk fast enough to see it with the eye. Next time when you drink Coca-Cola remember what it has done to the milk!