More Diet Coke and Mentos

Having produced a fountain which was more aesthetic than spectacular last time, we decided to try making a hole in the lid and then putting the lid back on before dropping the sweets in, on the basis that greater pressure should give greater height. Obviously, this presented a couple of interesting challenges: how to make a hole in the lid (J thought of a nail and hammer; I suggested a piece of wood underneath to hammer into, we ended up with 2 holes as it was such fun making them and one looked too small) and how to get the sweets in with the lid on, without them being in contact with the Coke before the lid was on and without getting covered in Coke spray as we wrestled with the lid 😆 We solved that one by also making holes (slits in the end, as they split) in the sweets and then threading them onto cotton, which J then poked through the hole in the lid, leaving the sweets inside the bottle, suspended beneath the lid and above the liquid. He held the string until Bob had the camera ready and then let go…
Whoosh! We had a double-headed fountain at least 2 metres high! (photo)

We have one bottle and a few mentos left. J really wants to try suspending the bottle from the climbing frame and swinging it as we let go of the string so that we get a moving fountain…
Watch this space!

2 thoughts on “More Diet Coke and Mentos”

  1. Ok, for some reason, I just can’t get enough of these kinds of Mentos-and-pop experiments! Thank god for YouTube videos of this stuff. Can’t wait to see what happens with your “moving fountain” attempt…..

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