Rectangular Prism
A kleenex box is a rectangular prism.
It has 6 faces.
http://www.mathsisfun.com/definitions/rectangular-prism.html
http://www.mathsisfun.com/geometry/cuboids-rectangular-prisms.html
http://www.korthalsaltes.com/model.php?name_en=rectangular%20prism
http://ck022.k12.sd.us/studentprojects/geometrysolids.htm