Portal Waste Disposal Unit Accessory A

Little is known about the "Unofficial Aperture Science Human Relations And Comfort Group", but it seems to be a group focused on the well-being of human test subjects.

Digging in the archives have unveiled the thing I now share with you. "Waste Disposal Unit Accessory A", or for the humans amongst us, "Toilet Paper Roll Holder".

Perhaps there's more parts to be found?