MENTOS CANDY INCLUDED Along with the Geyser Tube you will also get a roll of Mentos candies you simply have to supply a two-liter diet soda bottle and get ready for high-flying action! IMPROVED MECHANISM The improved geyser trigger mechanism helps to prevent accidental eruptions. You can get the perfect launch without getting drenched thanks to the double pull pin and tighter seal. Even kids can get in on the hands-on STEM learning. Manufacturered by Steve Spangler Science. COOL SCIENCE DEMONSTRATION When the Mentos candies drop into the bottle the soda geyser will shoot to an incredible height of 30 feet! Its a STEM science kit that will entertain young minds while they learn. IDEAL FOR CLASSROOM AND HOME USE You can use this Geyser Tube to bring the excitement of science to life at home or in your classroom. You can easily make STEM connections and teach lessons about gaseous reactions. GEYSER SCIENCE KIT The Steve Spangler Science Geyser Tube experiment kit helps you turn a bottle of soda and a roll of Mentos candies into an erupting geyser in just a few steps.