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 (other carbonated beverages may be used instead; Diet Coke is preferred because it tends to react better) and dropping some Mentos into the bottle, usually around four. This causes the Diet Coke to foam at a...
