Go anywhere in South Sudan these days, and one of the most common building structures is use is a banged-up old shipping container. These 8-by-20-ft metal boxes, once used to transport goods across the ocean, now serve as homes, classrooms, play yards, medical clinics and even hotels. And according to a new report from Amnesty International, they are also increasingly being used as ad-hoc prisons for government detainees, where the poorly ventilated containers can easily turn into ovens in the baking heat. Read More: The Only One God Left Alive The report details how dozens of detainees at one site near the capital, Juba, are locked together in a container, how they are fed only once or twice a week and how they are rarely given drinking water.