In a large part it has to do with the logistics. For simplicity: Oil is used for plastic, the specific kind of oil is siphoned off and processed in bulk for pla

In a large part it has to do with the logistics. For simplicity: Oil is used for plastic, the specific kind of oil is siphoned off and processed in bulk for plastic. If you want to recapture plastic and recycle. You’d need to get plastic, separate it, reprocess (more expensive in most cases), then you could mold again (often at a slight loss of input, I.e. there will be waste). This makes recycling plastic (today) multiple times more expensive to produce the same good. No one would want to spend double the current price on a soda.