It's not the only point in the article, but is the only one I'm commenting on here.
It's basically, "the majority of plastic waste comes from the company that sells the majority of the products" (or if they aren't selling the majority of the products, the article doesn't argue they have an outsize contribution), and it is implying that somehow Coca-Cola is where the blame for this pollution lies.
But what evidence are we given that they're worse than other companies, that it's not just because they sell the most popular products? The article doesn't give any (it does not say why they are comparatively worse). And nor does the article argue why the fault should be with the product producers. Are they the ones dumping the used containers in the ocean? What about the government policies regarding recycling or waste management? Or consumer behavior regarding waste?
I'm sure some people are going to see this comment as somehow just trying to defend a big corporation, but that is not my goal at all. I'm interested in the quality of the discussions surrounding these issues, and I'm trying to point out that the article's discussion doesn't meet very high standards.