Cubes


 * The Weighted Storage Cube, a vital testing apparatus in some Aperture Science Test Chambers.
 * The Weighted Companion Cube, a vital testing apparatus that, in-fact, cannot speak.
 * The Edgeless Safety Cube, a vital testing apparatus used in the cooperative testing initiative.
 * The Discouragement Redirection Cube, a vital testing apparatus for use with the Thermal Discouragement Beam.