4 portable water purifiers tested.
1. Sawyer Squeeze Filter ($55) – Best for backpacking. 2. LifeStraw Personal ($25) – Best classic budget. 3. Grayl GeoPress Purifier ($89) – Best comprehensive. 4. SteriPEN Adventurer Opti ($85) – Best UV.
AI-assisted research synthesis · human-edited by SUJI KIM · EU AI Act Art. 50 transparency
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