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 Everyday Examples
 Box:  A rectangular prism that can be empty or filled.

Image source: http://www.sli.unimelb.edu.au/aura/images/nbox.jpg

Cardboard and plastic boxes are commonly used for storage and shipping because they can be sealed easily, and a group of them can be arranged so that there is not any space between them.

Image source: http://doityourself.com/photos/brick.jpg

Cement bricks are often in the shape of a box so they can be stacked easily to form a wall.