Water is essential when touring Rome!

Fortunately, water fountains provided by the local government (Commune di Roma) are all over the center of Rome. To the delight of all, the water is tasty, originating from springs, lakes or filtered sources. The water does not seek vengeance on anyone unless you drink from a water source that says ‘NON-POTABILE’ (not drinkable!)

Best option for having drinking water: buy bottled water from supermarkets where they are a third to a tenth of the price at bars, food stalls or restaurants.  The same water bottles can then be refilled at the various public water spouts. Even smarter is to bring lightweight metal water bottles.