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The plastic bottles fit well but the water trickles in the second bottle. It doesn't spin around like a tornedo even after moving it very quickly in a circular motion. It was very cheap and worth buying to give it a go but I found it very frustrating to use.
Verified purchase: Yes | Condition: New
It is nice piece for bottle tornado experiment. The only detail is that it does not fit in any bottle.
Verified purchase: Yes | Condition: New