Cube may refer to:
- 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.
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