there was a thing on hacker news a couple of months ago by a group that measures that... the TLDR is that hot liquids or hot materials against plastic during production does increase micro plastics in food, which makes sense. Obv, we still don't have a full understanding of the health implications.

also, I think the company here is being generous to themselves... mocha pots, and pretty much all pour overs are all plastic-free... they really aren't the first to do plastic-free