Visible plastic pollution is horrible, and is only part of the problem. This then breaks down and was shown to enter and accumulate in not only animal bodies, including human bodies (soft tissue, lungs, even placenta[0][1]), but individual cells[2]. This includes BPA, a xenoestrogen used in most or all plastic bottles, which in EU is among the candidates for SVHC (substances of very high concern)[3].

[0] https://www.sciencedirect.com/science/article/pii/S016041202...

[1] https://academic.oup.com/toxsci/advance-article-abstract/doi...

[2] https://www.sciencedirect.com/science/article/abs/pii/S00489...

[3] https://en.wikipedia.org/wiki/Substance_of_very_high_concern (I expect the oil industry to do its utmost to delay this from having any legal effect, as per.)