Microplastics in Jadam fertilizer

I want to start making Jadam fertilizer, however I'm worried about the plastic buckets and ditting out and the whole fertilizing making process and how many microplastics that's going to leach into my fertilizer.

I've heard natural fertilizers can have a lot of microplastics in them. But I know in the end everything on our planet has microplastics at this point so I don't know if this is actually a big deal or not.

Does anyone have some data on this or have a plastic alternative that could work?

I read somewhere saying that the metal trash cans are not supposed to be used either. But I'm very new at this and I would love some advice.