Can you drink this water just like tap water… regularly or only a few litres a day?

Yes, you can drink UltraStream water as you would drink regular tap water.
We have observed that the amount of water people can drink once they install their UltraStream will increase because it seems to not bloat people as many ordinary tap waters do. We aim for 8 250ml glasses per day.

Try to drink it as close to the moment it leaves the UltraStream for maximum molecular hydrogen.