The Geyser Tube is a loading tube for the now famous Diet Coke geyser powered by Mentos and is one of the most viewed science experiments online. If you've ever seen a Geyser Tube in action, you know how addicting that wild soda eruption can be! We now have the perfect way to share this exciting soda spray gadget with everyone you know–by using one of our Geyser Tube event packs! Just can't get enough Geyser Tube action? Want more Geyser Tubes for the whole class? Maybe you need more Mentos and Geyser Tubes to conduct an explosive science fair project? Our packs are sold in 10, 25, or 50 so that you'll have enough Geyser Tubes and Mentos for any event!