Plural of costrel; multiple small flasks or containers for beverages.
The plural form of 'costrel', following standard English pluralization. The word costrel itself derives from Old French and Medieval Latin roots, becoming common in Middle English.
Medieval villages likely had costrel-makers as a specialized trade—you'd need dozens of these vessels for harvest workers, soldiers, and travelers. Archaeological digs often find fragments of costrils, giving historians clues about how people stayed hydrated during labor.
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