regarding Jill and Fenna, many products have expiration dates just to move them along, not that they will make anyone sick. Some people throw things out at the date the package says. Other people (like us) use it til its gone. We have yet to get sick. She probably found that stray amount of breast milk in the back of the freezer. Except that my freezer now has a drawer, that could have been me with a number of things.