Plain coconut water is literally just the water on the inside of a coconut. So if you can get coconuts at your grocery store you can get coconut water. I also found this recipe on how to extract and flavor the water: http://www.eatnapplay.net/2013/03/04/make-your-own-coconut-water/.
About Celebrity Solstice. Celebrity Solstice is a large ship, carrying 2850 passengers and 1246 crew, and sails from Sydney, Australia and Auckland, New Zealand.
2015 Celebrity's Solstice-Sydney to New Caledonia and Vanuatu - 9 days. 2014 Diamond Princess-Kyushu & Onsens Mystery Cruise around Japan due to 2 typhoons - 9 days. 2014 Ocean Princess-Australia and Asia - 20 days. 2013 Noordam-Adriatic & Roman Explorer - 22 days. 2013 Ocean Princess-Land of the Midnight Sun - 16 days. 2013 Celebrity's Solstice-Auckland to Sydney - 12 days.