Recently, I was chatting with a group of friends over lunch about launching things up into the air. Unavoidably, the whole Mentos/Diet Coke thing came up. I came across this Geyser Tube today and thought I should mention it here.
Our conversation was more focused on ways to get the bottle up in the air. We may run some experiments this summer to see if Mentos and Diet Coke is a sufficient propellant to lift the bottle. I’m pretty sure we’ll have to reduce the amount of Diet Coke in the bottle to optimize the thrust to weight ratio.
It looks like they’re currently sold out of the Soda Geyser Tube, but you can pre-order yours. For only $4.95, you can have loads of fun with your kids.
All I can say, is get ready to make a mess!