Simplify the following text for a Grade 8 native English-speaking person.
Original: In the case of Pandora , this jar may have been made of clay for use as storage as in the usual sense , or , instead , of bronze metal as an unbreakable prison .
Simplified: In the case of Pandora , this jar may have been made of clay for use as storage as in the usual sense , or of bronze metal as an unbreakable prison .