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Despite growing evidence to the contrary, wine remains the assumed content of many types of ancient pottery. Vessels from the Kyrenia and Mazotos shipwrecks, and Yeronisos island presumed to have contained wine were subjected to three different extraction protocols to test the assumption that these vessels were used to import and serve wine. Chemical extracts reveal grapevine products but also other fruit juice, beeswax and plant oil, sometimes mixed with grapevine products due to intentional mixing or reuse. Biomarkers detected in sediment samples from Mazotos and Yeronisos demonstrate why quantification is vital. Analyses show that even seemingly identical ceramics from the same shipwreck contained different commodities. [ABSTRACT FROM AUTHOR]