While faithful, you cannot take it with you.
The Enrichment Center reminds you that the Weighted Companion Cube will never threaten to stab you and, in fact, cannot speak.
It’s probably better that the Companion Cube can’t talk because I’m sure it wouldn’t have a lot of good things to say about you and or the Enrichment Center. Especially after you tried to dispose of it.
Don’t be a cube. Submit a byte.