B.Bath began in a classroom. Ishwarya Iyer, an early childhood educator trained at Harvard Project Zero, watched a three-year-old scratch her arm for the fourth time before ten in the morning. The child was reacting to a product that smelled lovely on the label. With Ganesh Sahasranam, a chemical engineer and her partner of fifteen years, Ishwarya spent two years going through the formulas ingredient by ingredient before selling a single bottle.