Senior engineer of Zangyi replied: Foaming is a normal phenomenon and a process of hydrogen production. You can go to Zangyi official website to see if there are any fake cups.

Nano-Barber hydrogen cup has a unique hydrogen production mode, which greatly improves the dissolution efficiency, and can reach a higher concentration in the same time, and can be prepared in 5 minutes (short press 1 turn-on is a short-time mode to prepare hydrogen water).