Earlier quoted context omitted.
I would have assumed (probably incorrectly) that the 'seal' which would come in contact with the glass & liquids would be a type of silicone lid, while it could be considered a type of plastic, if its a good food grade lid, I would imagine it's a bit better ? Ironically though silicone is much harder to recycle though.
U don’t recycle plastic, you burn it in a furnace. Spread the word.
Plastic is garbage. If you live in a place that burns garbage for energy, that's the best fate for it.