A Diet Coke and Mentos Eruption (also known as a Mentos eruption, soda geyser or just Diet Coke and Mentos) is a reaction when certain objects are dropped into carbonated liquids. The most well-known example of this reaction (among many possibilities) is the specific combination of Mentos candy and Diet Coke, typically achieved by dropping several candies into a bottle of the cola. This results in a jet of cola from the mouth of the bottle due to the rapid expanding of carbon dioxide bubbles on the surface of the candy. Producing the reaction has become a popular science experiment and an Internet meme, with videos of eruptions and even performance art pieces being posted on websites like Google Video and YouTube.

Why is Coke launching Diet Coke Plus, fortified with vitamins and minerals, now? Coke has morphed through Pepsi Cola wars, sweetened formulas, cherry, vanilla, diet, caffeine-free, lemon, lime, even coffee versions. Perhaps the fact that bottled water is facing controversies over its environmental impact makes the time right for a "healthy Coke."

IdeaTango.com was on the scene at Maker Faire Austin, TX 2007. Here are some videos of wacky things there including the diet pepsi and mentos explosion experiment with hundreds of 2 liter bottles, a life sized mousetrap, liquid nitrogen ice cream, and more.

This looks like the coolest trick since making a geyser by dumping mentos into diet coke, but it's fake. The video claims: Just add a bit of baking soda and several spoonfuls of hydrogen peroxide to some Mountain Dew and it will glow in the dark. Apparently, the prankster used some slight of hand to slip a bit of glow stick fluid into the bottle.

A bit about Diet Coke's new marketing technique, and a great picture of a squirrel

Coca-Cola is celebrating the 25th anniversary of Diet Coke, for which the company has created a host of commemorative items including limited editions of vintage Diet Coke T-shirts and 25th anniversary contour bottles that will be available through My Coke Rewards.