Freeze drying your breast milk can provide extended life and make it self stable based on findings by the USDA. Freeze dried foods may last up to 25 years when kept in proper temperature storage and free of oxygen and moisture. There are many factors that affect storage times including fat ratios, temperature and exposer to UV sunlight. Every BoobieJuice Pouch is made from a specialized high barrier film that does not allow oxygen to pass. Make sure to inspect your pouch for punctures prior to opening. We recommend keeping your pouches in a cool, dark place ideally in a room temperature environment below 80F and away from direct sunlight. Once open, please consume within 2 days. Well kept pouches can last 3+ years when stored properly.