"Spanish Storage Jar" serves as a catch-all category to describe utilitarian coarse earthenware vessels with Olive Jar paste, but in forms that are distinct from Olive Jars (such as straight sides, flat bases, wide mouths, etcetera).

This description of Spanish Storage Jar comes from the Historical Archaeology Digital Ceramic Type Collection maintained by the Florida Museum of Natural History.

Paste is coarse with incomplete compaction and medium sand temper. It ranges in color from light to dark terra-cotta. Well-fired examples are buff-colored. Exterior surfaces are poorly smoothed and unglazed. A “freckled” appearance created by the mineral temper, and a white firing effluvium may be present on the surface. Vessel walls are heavy (usually greater than 10 mm in thickness) and forms are utilitarian.