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.
Celebrity Solstice. Dining Options Onboard The Celebrity Solstice. Grand Epernay is Solstice's main dining room, located aft of decks 3 & 4 with room for 1429 guests and featuring a dramatic two storey high glass wine tower and dazzling chandeliers. Select Dining Seating - Between 6pm to 9.30pm (deck 4 starboard).