The essay juxtaposes three moments of medical infrastructure and technology aid in Phnom Penh, Cambodia: 1960, 2010, and 2005. The operative terms of these moments are relationship terms: ‘friendship’, ‘partnership’, and ‘orphan’. The 1960 gift of a hospital, equipment, and training made a friend, and reciprocity involved political alignment at the level of the nation-state. The 2010 gift of equipment and training made a partner, and reciprocity involved brand alignment spread across diverse government ministries, public hospitals, private universities, and private businesses. Focusing on the materiality of technology and infrastructure gifts brings us to the orphan. The orphan is a gift that turns toxic. Its toxicity is health-threatening if there is no infrastructure to secure it. The elaborate partnerships required to identify and secure orphan sources of radiation show how gifts of medical technology and infrastructure exist beyond their immediate utility to humans. What technology of partnership will the medical physicist of 2050 unearth, and what ethic of relationality will come to care for, repair, and secure it?