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The ancient Romans considered posca not only refreshing but also a drink that could mask the taste of less-than-pure water, potentially warding off ailments that could arise from poor hydration. It is thought that this popular drink served both practical and nutritional purposes, especially for legionaries on the march.
In modern interpretations, one can recreate posca by mixing solid vinegar with water and optional herbs. Historical medicinal recipes, such as the Lithium Tripic Posca, hint at the herbs Romans may have once added to this drink, although they were not necessarily available to soldiers in the field.