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 to be "euthanized". GLaDOS used this moment to taunt Chell during their confrontation.

The Companion Cube makes a prominent appearance in the Portal 2: Lab Rat comic, in which it speaks with protagonist Doug Rattmann. This appears to reference Portal, in which GLaDOS states that the Companion Cube cannot speak and if it does, its advice should be disregarded.

In Portal 2, The Companion Cube in Portal 2 hums a tune which can be heard when the Cube is nearby.

Trivia

 * Players who pre-purchased Portal 2 through Steam received the Companion Cube Pin item, a pin item depicting the Companion Cube within a portal, for Team Fortress 2. Players who played all games in the Potato Sack Pack were also awarded the Resurrection Associate Pin, which shares the same model.
 * Additionally, one of the possible names for the AI bots in Offline Practice or enabled by a server is Companion Cube.