As one of its daily deals, Amazon offers the 3M Aqua-Pure Under Sink Water Filtration System, model no. AP-DWS1000, for $169.10 with free shipping. That's $81 under our mention from last June and the lowest total price we could find today by $74. It purportedly reduces chlorine, odors, lead, particulates, rust, volatile organic compounds, MTBE, and parasitic protozoan cysts. Deal ends today.