The 13 Best Amazon Air Purifiers — Starting at $40

AIRTOK 2-Pack Air Purifier Set ($80 for two)

It's hard to beat the price of this air-purifier set, powered by a mix of activated charcoal and a high-efficiency filter. They're both on the smaller side, and their compact size will fit on a side table or nightstand without interfering with your room's aesthetic. Each air purifier covers up to 376 square feet a piece, so it's best for smaller spaces. It has a touch panel that includes a variety of settings, including a two-, four-, or eight-hour timer and specific fan speeds. Plus, if the essential oil sponge piqued your interest in the last slide, this air purifier has one, too.