Does anybody know if the Riu Vallarta filters their water? I'm concerned that they might use unfiltered city water in which case everybody says, don't use ice, eat anything rinsed with water, avoid frozen drinks, etc... you get the idea. I've heard of some resorts that fiter all of their water. So, does anybody know for sure??? Just trying not to get sick while I'm there. Leaving in less than 2 weeks!!! I can't wait.