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 damp/humid conditions. This can cause the powdered ingredients to separate and clump. As a result, the powder may not mix/reconstitute as well when formula is prepared. In addition, the powder may not be homogeneous, causing over-concentration of certain ingredients/nutrients. It won't harm your baby, but we think it best to store in the pantry for up to 4 weeks. We hope this helps answer your questions, and don't hesitate to get back in touch if you have any other queries about Bubs products.