wendy_woo2; no offense, dear, and I'm not trying to be cute or funny or insulting or anything like that. You just proved a point I was trying to make somewhere else on this site, without even knowing it. Thank you.
To answer your question, and we want all newbies to feel warm and fuzzy here, YES! Bottled water is very expensive on the ship--any ship. But you can refill your water bottle right from the tap in your cabin or from the water stations in the buffet, with water that is better tasting and cleaner than any you can buy.
Enjoy your cruise.