Amazon has got this PUR Water filter (in either black or white) priced at $19.99 but "clip" the 15% off coupon, and that price drops to $16.99 with free Prime/SuperSaver shipping. It got 4.0 out 5.0 stars over 258 customer reviews. (This water filter has a battery-powered sensor that tells you when to change the filter; make sure you remove the battery for Shomer-Shabbos use.)
- Max I on filter technology
- Certified to remove 99% of lead, and over 70 other contaminants including 96% of mercury and 92% of pesticides
- Clean sensor monitor - more visible electronic filter change light for enhanced filter compliance and 60% improved battery life
- New leak proof connector & improved grip
- 1 filter provides up to 100 gallons (2 to 3 months) of clean water
- Includes one Basic Faucet Filter
- Compatible with standard faucets. Will not work with pull-out or handheld faucets.