As one of its daily deals, Woot offers the Alexapure Pro Water Filtration System for $99.99 plus $5 for shipping. That's the lowest price we could find by $51. It purports to transform water from almost any fresh source into clean, healthy drinking water. It removes up to 99.9999%, holds 2.25 gallons, and has a filter capacity of up to 5,000 gallons. Deal ends today.