The Aperture Science Thermal Discouragement Beam Redirection Cube is a cube introduced in Portal 2. It's main purpose is to redirect Discouragement Beams, but it can also hold down Super Buttons. It appears to be a cube, with circular glass on all sides, and on one side, the glass is shaped differently to allow the beam to be redirected. In Portal 3, if more than one Discouragement Beam goes into one of these cubes, it strengthens the beam to do more damage and melt glass.