Machine (10) and method for treating containers (12) of liquids comprising in succession at least a loading station (15), into which the containers (12) to be treated are loaded, and all disposed according to a determinate first orientation, and a washing station (17), in which the containers (12) are subjected at least to washing and are disposed in a second orientation able to promote the fall due to gravity of the dirt and/or washing liquid present in the containers (12). The machine (10) comprises, downstream of the washing station (17) and outside it, a manipulator device (41) which automatically rotates the containers (12) exiting form the washing station (17) so as to reposition the containers (12) according to the first determinate orientation.