Researchers participating in MIT's Innovations in International Health program have created a solar surgical tool sterilizer that is being field tested in Nicaragua. A low-cost substitute to autoclaves, the Solarclave has a reflector that can focus sunlight onto the surgical instruments placed on a vessel. The vessel is a pressure cooker that can be purchased locally that is wrapped in fiberglass insulation and built into a bucket suspended upside down. The light rays can heat the vessel over 300 degrees F, well over the 250 degrees F minimum sterilization requirement, and can sterilize the contents within an hour even on cloudy days.