I am curious as to what to do with some old frozen milk that I caught when I was spraying like crazy at the beginning. There's about 16 oz, and it's been in the freezer for 5 months now. Not sure if it has lipase, but it might. DS is 6.5 months old, and not into solids yet. I guess I am wondering how much longer it will be ok in the freezer, or if it should be used soonish, and how?