Two double aqueducts, each more than 4 kilometres (2.5xa0mi) long and made of terracotta,[3] provided the city with fresh water from the springs at Chapultepec. This was intended mainly for cleaning and washing. For drinking, water from mountain springs was preferred. Most of the population liked to bathe twice a day; Moctezuma was said to take four baths a day. According to the context of Aztec culture in literature, the soap that they most likely used was the root of a plant called copalxocotl (Saponaria americana),[4] and to clean their clothes they used the root of metl (Agave americana). Also, the upper classes and pregnant women washed themselves in a temazcalli, similar to a sauna bath, which is still used in the south of Mexico. This was also popular in other Mesoamerican cultures.