Echo Water is a U.S.-based wellness company that produces hydrogen-infused water products designed to turn regular drinking water into hydrogen-rich water, which they say may support hydration, recovery, antioxidant activity, focus, gut health, sleep and overall wellness. They sell items like smart hydrogen water bottles (e.g., the Echo Flask), home hydrogen/filtration systems, hydrogen tablets, and related devices that generate or infuse molecular hydrogen into water. Their technology uses advanced methods to dissolve hydrogen gas into the water at higher levels than typical bottles and is marketed with scientific backing and consumer support features.