That doesn't seem to be the reason why they're abandoning the plan. It seems like instead it's because they would have to change the entire manufacturing chain, and therefore increase their carbon footprint by changing to recycled plastics instead of decreasing it.

> The “level of disruption to the manufacturing environment was such that we needed to change everything in our factories” to scale up recycled PET use, he said. “After all that, the carbon footprint would have been higher. It was disappointing.”