I think what lysozyme said holds even if you do not consider "whole" bottles at all. According to wikipedia the biggest microplastics are 5mm, whereas the enzyme is 10nm, that is 5 orders of magnitude of difference, but just in lenght! To process the entire volume you need to cube the units and you get 15 orders of magnitude in difference (1 mm^3 to 10 nm^3).
To get an idea I asked wolfram alpha what is the volume of the average human, and apparently that is around 66 liters. Then I looked up the estimated water volume of the Baltic sea, and wikipedia says it is 21,700 km^3 of water, soo
$ units
586 units, 56 prefixes
You have: 21.7E3 km3
You want: 66 liters
* 3.2878788e+14
/ 3.0414747e-15
if you could somehow fill your entire body with water, then make 30 copies of yourself, and you (30 of you) drink an entire Baltic sea (one for each), that is a very very rough analogy of the task we are giving to that poor enzyme. And this is for a single speck of microplastic! Of course the enzyme is not alone, there are a few other billions (trillions?) others with it, but there are also a few million specks of microplastic at any point in the sea. This is a very difficult task.
To get an idea I asked wolfram alpha what is the volume of the average human, and apparently that is around 66 liters. Then I looked up the estimated water volume of the Baltic sea, and wikipedia says it is 21,700 km^3 of water, soo
if you could somehow fill your entire body with water, then make 30 copies of yourself, and you (30 of you) drink an entire Baltic sea (one for each), that is a very very rough analogy of the task we are giving to that poor enzyme. And this is for a single speck of microplastic! Of course the enzyme is not alone, there are a few other billions (trillions?) others with it, but there are also a few million specks of microplastic at any point in the sea. This is a very difficult task.