How did Diet Coke and Mentos become so popular?

The combination of Mentos mints and Diet Coke (or any other carbonated beverage) gained popularity as a result of a chain reaction that produces a large fountain-like eruption. The reaction occurs when the Mentos' rough surface introduces nucleation sites for the dissolved carbon dioxide in the soda to rapidly form bubbles, resulting in a significant increase in pressure within the bottle and subsequent expulsion of foam and liquid from the opening.

This phenomenon, popularized by science demonstrations and viral videos, has captured people's attention due to its visually striking and somewhat unexpected nature. The dramatic reaction has made it a popular demonstration in science classrooms, public events, and online challenges. Its widespread appeal stems from its simplicity and the element of surprise it brings.

Moreover, the availability and accessibility of both Diet Coke and Mentos contribute to their popularity as a combination. Most people have easy access to these items, making it convenient to replicate the reaction. The combination has become a common part of pop culture, often mentioned or depicted in movies, TV shows, advertisements, and other media, further fueling its fame.