The custom of jar burial was employed by peoples who chose this practice for primary or secondary burial. Primary burial refers to the acts performed on the body immediately after death. In some cases, primary jar burial was more difficult to carry out. In
Cretan societies, the dead body would be bound tightly to fit into the desired jar. This was believed to be originally intended for infants and small children, but evolved to include larger categories of adults. Adult burial, however, required much larger jars, deeper graves, and more manpower. In
Egyptian societies, the body also could be sat upright, and then the jar would be forced on top of the body. Egyptians also would place the body into the jar themselves, rather than pushing the jar downwards, but this would create a need for a lid. Lids were not always ceramic; some have been found to be as simple as a rock or another jar. It seems the preference of how the body was placed did not have any particular significance.
Secondary burials are performed on bodies that has already been buried. The allotted time between primary and secondary burials varies between cultures; however, an emphasis is placed on waiting until the body has decomposed, and thus whatever technique is carried out as "secondary" concerns only bones lacking flesh. In this type of jar burial, the bones (flesh removed) were cleaned and subsequently put in a jar. ==Jar additions==