For me, it has a picture where it specifies a “polypropylene container”.
There’s also this bit from near the end of the abstract:
Additionally, the polyethylene-based food pouch released more particles than polypropylene-based plastic containers. Exposure modeling results suggested that the highest estimated daily intake was 20.3 ng/kg·day for infants drinking microwaved water and 22.1 ng/kg·day for toddlers consuming microwaved dairy products from polypropylene containers.
So, they’re, at least, discussing polypropylene and polyethylene.
Here’s the study in question. Can’t speak to the authenticity of it but off the top I don’t see anything shady
It doesn’t look shady, but I can only access the abstract which just says “plastics” and doesn’t specify that part further, unfortunately.
For me, it has a picture where it specifies a “polypropylene container”.
There’s also this bit from near the end of the abstract:
So, they’re, at least, discussing polypropylene and polyethylene.