But millions of women and girls around the world use other methods of managing their menstrual cycles each month, whether that's because they're unable to afford sanitary products or for environmental, health or disposal reasons. A new photo series from the charity WaterAid showcases the myriad surprising and inventive ways in which women manage their periods around the world. From Australia to Zambia, women and girls are fashioning their own sanitary pads and menstruation skirts from unexpected materials – and while they might not be women's ideal solution, they do the job.