It's difficult to say for sure what the most popular drink in the world is, as people's beverage preferences can vary greatly depending on where they live. Some of the most widely consumed beverages include water, tea, coffee, and various types of soda. In many parts of the world, water is the most commonly consumed beverage, as it is essential for hydration and is generally inexpensive and widely available. Tea and coffee are also popular in many parts of the world, and are often consumed for their taste as well as their potential health benefits. Soda is also widely consumed, particularly in the United States, where it is a popular choice for those looking for a sweet, refreshing drink.