The subject wants to ask, "Is it better to buy a hydrogen water machine or a hydrogen-rich cup?" That makes no difference.

1. Molecular hydrogen in hydrogen-rich water is safe and healthy electrolytic hydrogen, and industrial hydrogen cannot be used.

2. Hydrogen in hydrogen-rich water products must be "molecular hydrogen", not other forms of hydrogen such as hydrogen ions. So as long as you can drink safe and effective hydrogen-rich water, it is ok to choose regular hydrogen-rich water or hydrogen-rich water cups (machines).