Amazon offers this Whirlpool KitchenAid PUR Push Button Cyst-Reducing Side-by-Side Refrigerator Water Filter
, model no. 4396710P, for $45.14. At the final stage of checkout, it drops to $36.11
. With free shipping
, that's the lowest total price we could find by $13, although we saw it for $1 less two weeks ago. Sales tax is added where applicable. These filters purport to reduce lead and contaminants and leave beneficial fluoride in the water.