Implied warrant of merchantability happens when an individual such as jack in this question, goes to buy a product that did not work as expected. In this case, Jack requested for a Cola drink which he bought and later realized it was caustic drain cleaner. The warranty guarantees that the cola drink gotten from the fast food chain must work according to why it was purchased and the sellers are not required to explain to jack that Cola drink is what he was going to get when buying the product from them because the law on its own, creates that warranty.
