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The Ordo Hydro Sonic is a rechargeable cordless water flosser with hydro-kinetic pulsing up to 2,000 per minute, aimed at plaque removal between teeth and along the gum line. It is IPX7 waterproof, charges over USB-C, and the 700mAh battery is rated for 4+ weeks of use. A travel lock and a patented travel feature make it a reasonable pick for people who floss on the go. At $29.99 at eBay as of November 7, 2026, it sits at the low end of its recent range, with 5 stores listing it new.
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Lowest price we've seen: $29.99 on Nov 7 at eBay. Tracked across 9 stores since Nov 7.
Rated 4.5 out of 5 from 80 ratings, the Ordo Hydro Sonic is received well overall. Buyers like the cordless format and the long battery life for the price.