> Currently only about 3% of PP products are being recycled in the United States, but it is becoming more widely accepted So now the relatively small amount of mass in the cap is just as recyclable as the bottle itself -- neither are actually going to be recycled. There's nothing to see here but marketing. And a an interesting engineering puzzle solved, sure. "How Big Oil Misled The Public Into Believing Plastic Woul…
The only genuine path to sustainability is reduction. There is no sustainable way to have disposable single-use packaging that you throw away when the bottle empties. Glass bottles with a deposit to incentivize bottle return, following which they are washed and refilled with new product (ideally locally, with fresh ketchup arriving to local distribution centers in bulk), is a much more reasonable approach.
What I have seen work quite well is bulk filling stations in hippie groceries. So far liquid dispensing is limited to non-food e.g. laundry detergent but if people can grasp that model I think it can expand to a lot more items.