The first time I saw a bag like that, I was shocked as well. Seems like just the worst idea to use plastic to create tea bags. Turns out it is and they weren't made out of plastic. It's a starch based fiber that is biodegradable. I don't think you could have plastic tea bags here in the EU in any case. I'd wager yours isn't plastic either. Yeah, so you probably got mildly infuriated over nothing, just like I did the first time I saw one of these 🤷