Companion Cube

The Weighted Companion Cube (also simply called the Companion Cube) is an item featured in the Portal series of video games by Valve Corporation. Initially featured in a single level of the original Portal, Test Chamber 17, as one of Aperture Science's ubiquitous Weighted Storage Cubes with heart symbols printed on the outside, it is given to the game's main character, Chell, as part of the antagonist GLaDOS's sinister testing initiative. After carrying it through the entire level and ostensibly anthropomorphizing and "bonding" with the Cube, the malevolent AI forces her to unceremoniously dispose of it in an incinerator device. Companion Cubes later re-appear in the game's sequel with a slightly different design. The original Companion Cube is shown to have survived the events of both Portal and Portal 2, appearing as part of an ending gag.

Type: Storage cube

dimensions: 2.5 Feet (0.76 m)

The Companion Cube first appears in Portal's Test Chamber 17, where Chell is given it as a necessary tool to progress through the level. After being used to reach higher platforms, it must be taken with the player and used as a shield. The player must use the Companion Cube to activate three devices and jump across multiple platforms, before being forced to incinerate the cube.[4] The Cube returns at the end of Portal 2, where it is discharged from the facility by GLaDOS following Chell's egress, still bearing burn marks from its supposed incineration