Once we receive your milk it is weighed and recorded for you. The process then starts by placing your breastmilk into a special chamber where a pump removes the air from the chamber creating a vacuum. Then sublimation occurs where the milk's ice crystals are turned into water vapor. The water vapor molecules are pulled out of the milk, leaving behind your milk turned into nutrient rich powder! Your custom powder is then packaged into food grade mylar bags to protect it and making it shelf stable for 3+ years!