Each bag of frozen milk you send us becomes its own pouch of breast milk powder. Each pouch has a custom label detailing any info you recorded on your bag (expression date/time, notes about your diet or meds, etc.) Each bag also tells you how much water to add to rehydrate your milk to its exact original consistency. Freeze-drying extends the shelf life of your milk 3 years from the date of freeze-drying, and your new expiration date is printed on every bag! Freeze-dried breast milk powder is easy to use – just add warm water to make a bottle, or sprinkle onto solid foods for a nutritional boost anytime, anywhere!