Vessels to hold water or wine were made of leather—hence the translation ‘skins’ (of goats or pigs; Matt. 9: 17). The animal's shape was retained for the bottle, and the neck was tied. The gases of fermenting wine could destroy old wine skins (Mark 2: 22)—a reference to the incompatibility, as Mark understood it, of the new institution of the Church with old Judaism. Vessels of earthenware were also available (Jer. 19: 1).