Coke Geyser - Part 1

A Diet Coke and Mentos eruption (also known as a Mentos eruption or a Coke geyser) is a reaction of Diet Coke and mint Mentos candies. A two-liter bottle of Diet Coke or some other carbonated beverage is used. Diet Coke is preferred because it produces a more spectacular reaction. The bigger the bottle of cola, the bigger the eruption.

Dropping some Mentos into the bottle causes the Diet Coke to foam at a rapid rate and spew into the air. Mint-flavored Mentos are used, as cola-flavored Mentos have a smooth coating that slows the reaction. Because of the spectacular nature of this physical reaction and the easy availability of the ingredients, the eruption is a popular subject of Webcast videos. A variation on the Coke geyser is the bottle rocket. The Mentos are inserted into the bottle, after which the cap is immediately replaced and the bottle slammed onto the ground cap-first. The resulting explosion generates a rocket-like reaction.

A Guinness World Record of 1,911 simultaneous geysers was set on June 19, 2008, by students of the School of Business Administration Turiba in Latvia.[1] The record was beaten in August 2010 in Mexico City, with 2,433 simultaneous eruptions.