You know all about Mentos and Diet Coke right? Together, they make one of the coolest backyard science experiments ever discovered!

This small gadget, Steve Spangler's Geyser Tube to be exact, is a world-wide internet sensation that allows you to carry out this cool experiment, and to maximise the effects!

Simply load a packet of Mentos chewy mints into the screw-on transparent tube, lock it into your 2 litre bottle of diet coke (any aerated drink will do, but diet cola achieves the best result), and pull the pin!

And you guessed it, RUN!

The moment the chewy mints hit the liquid, a spectacular and powerful soda geyser explodes from the top of the bottle with enough pressure to reach up to 30 feet!

And thanks to this creative little gadget you'll get a perfect lift-off every time without getting drenched!

All necessary instructions for a successful launch are included.
Educational information on how the eruption occurs is also included.
The Geyser Tube is 16cm in length.
Recommended for ages 8+

  Geyser Tube Specifications

Barcode # 896432001025
Brand Steve Spangler Science
Shipping Weight 0.10kg

Geyser Tube Reviews

This was really

By: Alana on 6 April 2020 - Verified Customer
This was really cool!! I watched my kids do it. Went so high!

kids thought they were COOL!

By: Vicky on 29 November 2019
What a great product! Ordered geyser tubes for secondary school experiments. Received them promptly and were used by kids. Teachers said they worked really well and the kids thought they were COOL!

Well that was fun!

By: Peter Hemming on 26 November 2018
Have not done this trick for a long time, and my grandson’s birthday started with the bang it deserved. He just loved it and I would recommend this good ‘clean’ fun to anyone.

Cool People Also Bought

When people buy the Geyser Tube they normally buy these too:

More Cool Things From This Category

Most popular sellers from the Cool Science Projects category: