In 2012 David Mast designed, and his brother-in-law Toney built, a composting toilet with an above ground septic box. This experimental system gained approval from the local building and sanitation inspector. This validation, along with the dissatisfaction of composting toilet limitations, fostered a desire to identify improvements. Soon David found himself researching and developing new innovations.
The original composting toilet with an above ground septic box became a Field Model used for testing David’s new ideas and concepts. Eventually a "thermophilic state" was achieved which produced a substance described as “Fluff”. This first milestone was an upgrade from "intolerable" to "tolerable", though there were still more issues to be resolved.
Five major barriers to success were identified: Excessive Moisture, Heat Efficiency, Oxygen Demand, Clumping and Bad Odor. After 5 years of hard work and dedication, 3 prototypes where made, tested and improved upon. In 2017 a patent application was submitted. The project entered a product development phase which lasted 3 more years. After 3 rounds of testing and further improvement, a final product emerged. In 2022 the Droilet™ was introduced as the world's first stand-alone non-sewered sanitation unit.