The Weighted Companion Cube was first introduced in Portal, and remains prevalent in Portal 2. Similar to the Weighted Storage Cube, the Companion Cube possesses a different design in Portal 2. The Cube functions in the same way as a Weighted Storage Cube, being differentiated to encourage test subjects to feel attached to the Cube.

"The Enrichment Center reminds you that the Weighted Companion Cube will never threaten to stab you and, in fact, cannot speak." — GLaDOS

This Weighted Companion Cube is modelled from the Orange Box's Portal.

© 2007 Valve Corporation

Everyone on Thingiverse who're sharing their Portal's Companion Cube did quite a bad job in modeling it, including the past me X(

Now, Ladies and gentlemen, I hereby present to you… The most (100% :P ) accurate printable model of Weighted Companion Cube!

You can download this: http://www.thingiverse.com/thing:33140 if you want to paint the ❤ heart yourself.

Just remember, don't incinerate your only friend…