Can you brush your teeth with tap water in Brazil?
Many Brazilians use a clay filter pot at home, but others have a more modern filter in the building or apartment or individual sink tap. Hotels usually have good filtration systems, allowing you to use tap water to brush teeth.
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Believe it or not, most of the world's population, in particular indigenous cultures and developing countries, still use old-world techniques to keep their teeth clean, or they don't use any at all. It is only common in the U.S. and other developed countries that use nylon and electronic toothbrushes.
Violent crime, including mugging, armed robbery and carjacking is common. These occur more often in large cities and during festivals, such as Carnaval. Don't go out alone at night. Avoid isolated areas, including beaches.