Received I believe four or six bottles of quality bottled at Park Hyatt Siem Reap two days ago. Requested four more at turn down service , was graciously given.
The thing about giving one bottle and asking people to refill their bottle — I hope that the water source is close to the room. Otherwise it can be quite time consuming , if one has to take the elevator and go to the lobby every time.
Better to leave it to the guest, rather than to impose something from hotel chain headquarters.