Woot offers Amor3 Air - Personal Air Purifier for $15.99 (reg. $39.99) free shipping with Prime. 

Product Description:
2-in-1 Filter Technology: 2 in 1 true HEPA filter traps and destroys 99.97% of particles as small as 0.03 microns. Enjoy improved air quality as the premium 2-stage filter safely cleans the air, trapping dust, pollen and helping allergies, while also reducing cooking odors and eliminating smoke with a savory aromatherapy tablet. Small But Efficient: No matter the activity this powerful and subtle portable air purifier produces a calming white noise. It is quiet enough for travel on public transport, like planes and trains, while also being great for stuffy hotel room air and use while sleeping or relaxing. Built To Travel: Our small air purifier is made for transport, being able to fit into any purse, briefcase, or luggage. Fits in standard automobile cupholders, and the rechargeable lithium battery lasts for up to 10 hours. Includes a USB port for quick charging. Easy To Use: Operate the Amor3 Air purifier with a simple press of a button. The purifier comes with two speed settings, low and high, and has a negative ion button. This is ideal for purifying the air in your immediate personal space. It has a generous coverage area of up to 200 sq ft! To ensure your unit works properly and lasts as long as possible make sure to replace your true HEPA filter every 6-9 months.