Protocycler recycles plastic bottles into 3D-printing material

Wonder if this is some kind of a hoax... Sounds a bit too good to be true to me. I would love to know How does the colouring work and what does it cost? If you throw in legos and whatnot how guaranteed is it to work with manufacturer X printer? Doesn't different plastics have different properties and don't these properties change if the plastic is melted over and over again?