BRAND NEW, NEVER USED. Stay hydrated in style with the Echo Water Flask hydrogen water. Perfect for home or on-the-go use, this sleek bottle combines functionality with a modern design. Hydrogen water is regular water (H₂O) infused with additional hydrogen molecules (H₂). While it may seem simple, adding these tiny atoms of hydrogen supports general wellness. But why add hydrogen? Studies indicate that hydrogen, as the smallest and lightest molecule, can penetrate cells and may support wellness in ways regular water does not.