Amazon offers its Prime members this PUR 2-Stage Water Pitcher Filter 4-Pack
, model no. CRF-950Z-4, for $19.99
with free shipping
. (Non-members can spend $25 or more for free shipping; otherwise, shipping adds $5.21.) That's a buck under last week's mention and the lowest total price we've seen. (It's a current low by $8.) These filters purport to reduce lead and contaminants and leave beneficial fluoride in the water.