Fanta is a world famous fruit-flavored carbonated soft drink. Today, there are more than 100 flavors all over the world. However, few know that the birth of this tasty drink is associated with Nazi Germany. During WWII, there was a trading ban between the United States and Germany, which meant the Coca-Cola syrup was not allowed to be imported to the manufacturer in Germany. Max Keith, the head of the German Coca-Cola company, decided to develop a new soft drink in place of Coke, using ingredients available in the country at that time. He used apple fiber, leftover from cider pressing, and whey, a byproduct from cheese making, to develop a yellow-colored drink. Keith asked his employees to use their "Fantasie" (the German word for imagination) and create an impressive name for this new product. On hearing this, one of the employees Joe Knipp immediately came up with the name Fanta. Little did Keith and Knipp know that the mixture of leftovers would soon become popular and someday even take the world by storm. Throughout the war, the flavor of Fanta varied depending on what ingredients were available. Despite the severe devastation in Germany during the war, the company maintained stable profits, with an annual production of sixty million bottles. After the war, Fanta was introduced to the United States. Today, Fanta is available in 188 countries. Of the 100 flavors, Fanta Orange is the most popular one. Some flavors are available in some countries only. For example, in Japan there is Japanese Peach Fanta, and in Hong Kong there is Sour Green Apple Fanta. In Germany, elderflower is used to produce Fanta. Fanta never stops renewing itself, either by creating new flavors, bottles or with captivating advertising campaigns. What is this passage mainly about?