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Coke (PET) Bottle Tornado Coupler
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This is a coupler for joining two Coke (or other 28 PCO 1881) bottles to make a tornado effect! Great science fun!
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Updated at source:
Model information
- Source
- Printables
- Category
- Other Toys & Games
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
This is a coupler for joining two soda bottles to make a tornado (reference: https://www.wikihow.com/Make-a-Tornado-in-a-Bottle).
There are three models:
- Coupler, short—use this on its own, and tighten the two bottles to each other.
- Coupler, tall—use this with the reducer.
- Reducer—use this with the long coupler to create a smaller opening for a different tornado effect. Print in flex. It's a tight squeeze to get it into the coupler, you might need to use a C clamp and some elbow grease.
It's impressively less leak-resistant when used for tornados. If you squeeze the bottles to create pressure while there's liquid over the coupler, well… that's another science experiment.
Update 2023-03-13: There is a new r3 version of the coupler with an added grip (thanks Onboard4970 for the idea!)