There was one to the right of the television screen in the EPF Command Room. If you clicked on it, it filled up with paper.
There was one in Aunt Arctic's igloo in mission 1 and one in Gary's Room in mission 4. They both had four states rather than three. However, the one in Gary's room did not contain a state with scattered paper on the floor.
Arrow key changes
Pressing the up/down arrow keys added trash to the bin.