Yes, you can safely drink tap water from hotel bathrooms in almost every city in Italy. The water in Italy is clean, strictly monitored, and safe for human consumption unless there is a specific sign that says "Acqua non potabile" (water not drinkable). This applies not only to hotels but also to public apartments and the thousands of historic "nasone" fountains found on street corners in cities like Rome. The water is often mineral-rich and quite delicious, especially in regions like Tuscany or near the Alps. Some travelers might notice a slight "chlorine" taste in larger cities, which is simply part of the safety treatment process, but it is not harmful. Using tap water is not only safe but also the more economical and ecological choice, helping to reduce the massive amount of plastic waste generated by bottled water. If you are in a very old building or a remote rural area and are unsure, simply asking the hotel concierge "Is the tap water safe?" will usually result in a confident "Sì."