Raising humidity - plastic or acrylic side walls?

[Minigrower]

Hi - I have outgrown a spot in the garden window for my orchids, and am setting up a new spot in the living room. I use humidity trays, but the house dries things out. I want to hang plastic around my plants, but am worried plastic may not be safe enough in a living area shared by pets and people. Would acrylic be safer? Any suggestions? I'd sure appreciate it. Thanks. - Minigrower