Amazon offers Prime members the 3M Filtrete Water Station Tap Filtration System with Four BPA Bottles
in Black, model no. WS01-BK-MC, for $16.49
with free shipping
. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $8.20.) That's $4 under our mention from last November and the lowest total price we've seen. (It's a current low by $7.) The system purportedly filters two and a half times more water than traditional pitcher filters.