Pour into one, see liquid in anotherSourced
Fuddling cups join several vessels internally
A fuddling cup connects three or more cups or jugs through holes and tubes. Liquid entering one can reappear in another, and draining the set requires finding the right order. Separate-looking vessels conceal a shared route inside.
The visible units do not reveal every connection.
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Fuddling cup · Wikimedia contributors
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Reviewed: 2026-10-05