Yeah PET was a bad specific example. I think the issue is that plastic is useful for reasons other that just the material cost. Shipping glass is both dangerou

Yeah PET was a bad specific example. I think the issue is that plastic is useful for reasons other that just the material cost. Shipping glass is both dangerous and VERY energy intensive. Treated paper doesn't hold pressure, and is easily damaged. There are a lot of other reasons why plastic is suitable for packaging that I won't enumerate at length here, but I think it's reasonable to say that there are legitimate uses. I will wholeheartedly agree that plastic packaging is over used. That said, fishing and marine waste are still the single largest source of ocean plastic.