I have to chime in here.... I am not a fan of the waste caused by bottled water, but I have noticed that on our three cruises (and at Disney World FWIW) I have refilled my reusable water bottle at the soda stations using the "water" tab. Each time, I have developed a sour stomach that got worse as our vacation progressed. Not sure what else to call it. Maybe I am just sensitive but if you think about it, they are really recycling waste water so not sure if that's a great option for everyone. Water is different everywhere; I have had issues on other vacations (in the US) as well. Out of the country drinking bottled water, I always seemed okay. We brought bottled water to the WDW parks last time bc of this, and I am considering doing the same for our next cruise. I think it's just a personal preference/issue.