Review on Enoch Bamboo Charcoal Air Purifying Bags (8 Packs) - Activated Odor Moisture Absorber for Natural Air Freshening. Deodorizer Bags for Homes, Cars, Shoes, Fridges, Closets - Includes 4x200g + 4x50g by Dave Connelly

Purchased 8 pcs. He placed them in different rooms and in the car. The reduction in the smell from them was noticeable the next day. Unlike some electric air purifiers, they are passive and rely on natural air exchange. So don't expect them to be that effective. However, if they are quiet and cheap to run (because they are renewable and don't require energy), I think they're worth it.