We've called it Dinkins water, Giuliani water, Bloomberg water (3 terms), and now DiBlasio water: without mayoral recognition, it's really NYC tap water, and terrific drinking water. When seated at a restaurant, they'll ask if you want bottled water or 'regular' (tap) water. No need to spend extra $$$ for bottled water (unless of course you want Pellegrino or sparkling water), the NYC water (which is free) is just fine. You can get it with or without ice. Or, as Marguerite Iskenderian says, "I wonder how many people know NY has the best water in the U.S.?"