How is that even possible?
By using a feature the ancient Romans were kind enough to leave as a legacy - the large number of free, and very safe, drinking fountains.
In the singular, the word is "Nasone" (pronounced "na-soh-nay") and it means "big nose". You can kind of see why...
Made of cast iron, they stand about three feet tall and weigh in at an impressive 200 lbs. There are 2,500 of them scattered around the metropolitan area, and you can find some of the oldest in the Trastevere district.
They're used every day by locals who would no more think of paying street vendors for an overpriced bottle of water than fly. Why would you?
It's not only safe, it's ice-cold, and it's fresh. Just what you need to keep hydrated on a hot summer's day. Or any other time, come to that!
This water comes directly from the mountains above the city. It's pure, fresh spring water. Uncontaminated with chemicals. Free from added salt. Just. Plain. Water.
It's licensed by the City of Rome, and it's tested for purity around 250,000 time each year. So yes, it's completely safe!
It's piped into the drinking fountains of the city by an aqueduct originally created by the Romans, centuries ago. And there's enough for every single family living in the city to have 550 litres to drink - Every. Single. Day.
So there's plenty left over for visitors!
And the rest does not go to waste. What's not used for drinking is taken for watering gardens, plants and for use in shops and factories. The flower market at the Campo de'Fiori, for example, depends on the square's two Nasoni to keep the plants fresh.
Rome is known as "La Regina dell'Aqua" - the Queen of Water - for good reason!
If you don't have a water bottle with you to fill from the spout, put your finger inside the spout to stop the water coming out. You'll find it then comes out of a small hole in the top, so you can try drinking without the need to put your mouth to the metal.
Sometimes they're called "fontanelle" - little fountains - and you'll see them in walls all over the city. These are more decorative than the Nasoni, but the water is exactly the same - so they're just as good to drink from.
This one is the oldest drinking fountain in the city, and the most iconic. The spout is in the shape of a wolf - the she-wolf associated with the founding of Rome.
You can find this one for yourself in the Giardino degli Aranci - the Garden of the Orange Trees - on the Aventine Hill.
That's not the only one, though. Many of them are leftovers from ancient Roman times, some more recent. This wall-mounted fountain was restored to its former glory in 1998.
Note the letters "SQPR". They stand for "Senatus Populus Que Romanus" which, translated, means "The Senate and People of Rome" and they're used today as an emblem of the present day "comune" of Rome.
Trying to spot more instances of SPQR as you visit different parts of the city is a fun game with kids. Here's a clue - you'll find them on all the Nasoni!
It can also be entertaining for them to spot more wall fountains - some have interesting features, and weird and wonderful creatures. This dragon fountain is a special favourite: find it at the Via della Conciliazione.
No! In fact, even trying to drink from fountains like the Trevi could get you into serious trouble! Those fountains are strictly for looking at only. You wouldn't want to, anyway - the water in them is recycled, not fresh.
There's one exception to that. The fountain at the bottom of the Spanish Steps - Bernini's "Barcaccia" fountain - actually provides steps which you can stand on to take some water from the fountain.
Local people would never use this - they'd always go for the Nasoni - but it's a popular place for tourists both to fill bottles and to have their picture taken.
To make sure you don't need to join a long queue, get there either early morning or later in the evening, when most people are eating.
This is a short (6 minute), entertaining video which shows you round some of the more well-known of the city's drinking water fountains.
You'll see lots of drinking water fountains as you walk around Rome, but if you'd like to download an app for your Smartphone before you travel, there's a good one called I Nasoni di Roma, at this link.
Although other apps exist, this one is unusual in that it lists all the drinking fountains. It can be a little buggy when you first launch it, although that might be because of a weak internet connection. Once it's launched, though, it's very helpful.
It's free, and compatible with the iPhone, iPad and iPod Touch. So if you're lost in the heat of Rome and you need water, you'll always be able to find a free source!
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