Amazon.com has 3-Pack ZeroWater 5-Stage Replacement Water Pitcher Filters (ZR-003) for $18.98 when you checkout via Subscribe & Save. Regular purchase is $19.98 if you don’t want to do S&S. MAX quantity of 3. Shipping is free with Prime or on orders $25+.
This was previously a Front Page deal a few days ago but it was at $21 for S&S.
https://www.amazon.com/gp/product…0DER&