Update — February 2026: This comparison previously featured the Big Berkey. In 2023, the EPA classified Berkey’s Black Elements as unregistered pesticides under FIFRA due to their silver antimicrobial properties, resulting in US stop-sale orders. We’ve replaced the Berkey with the Waterdrop King Tank — an NSF/ANSI 42 & 372 certified gravity-fed alternative at a lower price point. Our Top Picks at a Glance Best Overall Value: Sawyer Squeeze ($38) — 100,000-gallon lifespan, fills bottles, 3 oz