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Edgeless Safety Cube

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Edgeless Safety Cube
General information

Aperture Science


Calibration-based ball

Used by
"You have no idea how tiring it is to praise someone for placing an Edgeless Safety Cube into a receptacle designed to exactly fit an Edgeless Safety Cube."

The Aperture Science Edgeless Safety Cube is a testing element used throughout the Aperture Science Enrichment Center, introduced in Portal 2.


The Edgeless Cubes open doors or activate platforms when placed in a circular receptacle, serving the same purpose as the Weighted Storage Cubes. Additionally, they can also be used to depress the Super Button if placed carefully. Similarly to their cubic counterpart, they appear blue when neutral, and turn yellow when placed on their button.


In the single-player campaign, the Edgeless Cubes appear only in Test Chamber 06 of GLaDOS' Testing Track, in a number of two. They can be used to solve the room's puzzle. They are featured more extensively in the Cooperative Testing Courses, appearing in such locations as Test Chamber 02 of the Team Building course, Test Chamber 04 of the Mass and Velocity course, or Test Chamber 03 of the Hard Light Surfaces course.

Behind the scenes[edit]

The advanced version of Portal's Test Chamber 17 features a Weighted Storage Ball. It is unknown if it's related to the Edgeless Safety Cubes.


List of appearances[edit]