Last updated: 30 March 2026

This is an opinion piece. Views expressed are the author's own and do not constitute professional advice.

Cool Factor: 4/5

This Phox water filter review is based on six months of daily use in London, one of the hardest-water areas in the UK. Spoiler: the kettle has never looked better. Phox is a Glasgow-based company that makes the world's first refillable water filter cartridge, and after half a year of testing the Clean blend we're ready to give you the full, honest verdict on taste, cost, eco credentials and whether it's genuinely worth ditching Brita for good.

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