Walmart has the Keurig K-Duo Essentials Coffee Maker (5000204976) for $79 with free shipping. List price: $99. It features 60-oz. water reservoir, 12-cup glass carafe, pause and pour function.
Amazon has the Waterdrop Reverse Osmosis Water Filtration System (WD-G2-W) for $300 - $60 off with coupon FILTER234 = $240 with free shipping. Retail price: $350. Features tankless design, removes sediment, rust, large particles, colloids, chlorine, fluoride, and more, includes 2 replacement filters, water flow rate of up to 400 GPD.