Waiting for lab results is slowing science down! We are designing a fully open source portable incubator that will speed up field work in the life sciences. It will provide rugged and reliable results outside of a laboratory to cultivate various microbes. This includes testing for E. coli as a marker for fecal contamination in drinking water, a leading cause of death in children worldwide. The grant will allow us to build 5 prototypes and test them for usability, portability, and ruggedness.