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Other Hobby & DIY
Whirlpool Bottle Cap
by Maker Man
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Specifically designed to securely join two 1-liter bottles, creating an airtight seal.Whirlpool Effect: Enables the creation of a mesmerizing whirlpool or tornado effect when one bottle is inverted and the other is stationary. Ideal for educational demonstrations and fun science experiments. PS: Use any type of tape for a good water tight seal!
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