The word 'stoup' is old-fashioned and not common in modern English, but may appear in historical texts. Reading medieval literature, one often encounters a 'stoup of ale'.
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Large Size
'Stoup' implies a container of significant size, often more than just a cup or mug. The villagers used a wooden stoup to collect rainwater.
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Liquid Holder
Typically, a 'stoup' holds liquids, which can be for drinking or other purposes. He poured the cider into a rustic stoup before serving.