Why Plastic Water Bottles May Not Contain as Much Recycled Plastic as AdvertisedA green accounting method called "mass balance" certifies that something was manufactured with recycled plastic — just not necessarily much of the bottle making the claim.
Source: Why Plastic Water Bottles May Not Contain as Much Recycled Plastic as Advertised (https://www.nytimes.com/2024/08/26/business/energy-environment/tritan-renew-plastic-bottles-recycled.html)