Yeah, I would go with the plastic, but it may be better to use HDPE. If you're looking for something durable and lightweight, that's the way to go. I don't remember how much it is. I think it's pretty cheap, and is really effective. Plexiglas is also a durable, but I think it's like jinxed. It always takes forever to get to my house. That may be completely irrelevant, but at least I spelled irrelevant right.