Can combining Diet Coke and Mentos make your stomach explode? Explanation: Ever have one of those days when you have to eat lunch out of a vending. Drop Mentos into a bottle of soda and run away from the 20 foot geyser. It's been called Why do Mentos turn ordinary bottles of diet soda into geysers of fun?. A Soda Geyser is a reaction between the carbonated beverage Diet Coke and Mentos mints that causes the beverage to spray out of its container. The gas. Cleanup Hose off any part of a building that was splashed with Diet Coke. Science Videos SICK Science! That means that all of the pieces of the reaction are there, but that they are simply rearranged. Size Matters Another factor that contributes to the size of the geyser is how rapidly the object causing the foaming sinks in the soda. Fortunately, the maker of Mentos Perfetti Van Melle also liked the design, and we launched the Mentos Geyser Tube toy at the New York Toy Fair in February The Accidental Discovery of Saccharin, and the Truth About Whether Saccharin is Bad for You NEWS Phones Nigeria Science Technology Computers. Scientific American maintains a strict policy of editorial independence in reporting developments in science to our readers.