I have left a new roll filament near the printers.
As the Solidoodle (last I checked) is still being repaired by Decklin, the space is out of PLA filament, the Printr bot can’t use ABS, and I have run out of my own filament - I just added an extra roll for the space when I was buying more. [It makes postage seam cheaper per item ]
It is clear/natural 1.75 PLA, intended to make the Printrbot useful again, and ended up just under $30.