The name of this expensive water is the Kona Nagri, which is bottled by the Hawaii Deep Marine.
This water is a seawater mineral concentrate that you mix with your regular drinking water.
The Japanese are driving the cost up even more as they cannot get enough. At this time, only 2 ounces of Kona Nigari costs $33.50 USD.
If you are thinking about purchasing one gallon, then better be ready to spend $2,144.00 USD.