Amphora is a kind of large tall ceramic container used for transportation and storage of goods. Used from antiquity until the 16th century or so. Used for
wine, oil,
olives,
grain, etc, etc. Amphoras in a shipwreck can often tell the age and nationality of the wreck.
Link:
Amphora Types According to Dressel (http://www.abc.se/~pa/mar/dressel.htm)