We don't recommend freezing the formula. You don't need to as it can be stored at room temperature and can be used for up to 4 weeks after opening the foil seal. We do not recommend you freeze any formula in the freezer for a number of reasons. Storing powder in refrigerated conditions exposes the powder to condensation. This can cause the powdered ingredients to clump. As a result, the powder may not mix/reconstitute as well when formula is prepared. We recommend that you store it in the pantry for up to 4 weeks.