Ordering water at a restaurant
Despite the fact that Italy has very safe drinking water, you will never get tap when you order water at a restaurant. By tap I mean, they will not bring you a free glass of water. In general we were brought a (cold) 1 liter bottle of water and were charged anywhere from 2-4 Euros for this. If you don't finish it, you are free to take it with you. Also as a side note, when you order water, they may by default bring you sparkling water, or seltzer. So it is good to ask for "no gas," if you want plain water.
