The Aperture Science Weighted Storage Cube is a heavy cube that only appears in Portal M4R10 - If Mario was in... Portal. It can be used to activate the 1500 Megawatt Aperture Science Heavy Duty Super-Colliding Super Button.
The cube is gray and has a blue circle with the Aperture Science logo. The circle appears on every side on the cube. When it activates the 1500 Megawatt Aperture Science Heavy Duty Super-Colliding Super Button, the blue circles turn orange. When deactivated, it reverts back to blue. However, in the Mario Portal video, even over 10 of these cubes is not enough to activate the megawatt button. Mario steps on it and the button activates.
- There is an alternative version of this cube called the Aperture Science Companion Cube where the circles are pink and the Aperture Science logo is replaced with a pink heart.