Weighted Companion Cube

The Weighted Companion Cube', often referred to as the Companion Cube. is a recurring object in the Portal universe. It appears almost identical to the Weighted Storage Cube but with a pink heart replacing the Aperture Science logo.

In the first Portal, the Companion Cube was given to Chell to aid her in completing Test Chamber 17. In order to progress through the exit at the end of the chamber, the cube was dropped into the incinerator. GLaDOS used this moment to taunt Chell during their confrontation. However, the Companion Cube can be seen prior to the end credits next to the cake.

In Portal 2, GLaDOS briefly torments Chell by repeatedly destroying Companion Cubes in a Test Chamber. After Chell leaves the facility, however, a scorched cube is ejected after her.

The Companion Cube makes a prominent appearence in the Rattman Comic, where it speaks as part of a reference to the first Portal game.

Players who pre-ordered Portal 2, or played every game in the Potato Sack, recieved a Team Fortress 2 Pin depicting the Companion Cube.