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We applaud your efforts to provide the very best for your baby, but know you sometimes have questions or concerns about breastfeeding or pumping. Our Certified Lactation Counselors and child experts are here to help you and offer support. For specific Lansinoh product usage questions, please contact customer service by email or (800) 292-4794 between 8am-8pm est.


Frozen breastmilk bags leaking upon thawing



I have a 5 month old baby girl, for whom I have been pumping, storing and freezing breastmilk since February for when I return to work. I currently have over 100 bags of milk. I froze each bag flat and have them stored in the back of the freezer in Ziploc freezer bags. Each time I thaw out an individual bag of milk, it leaks. I don't know what is going on, but it is wasting so much milk. I'm getting very frustrated because I thought these would not do that. Do you have a solution for how not to have them leak?

Thank you!


Amy, we are sorry this is happening and that you have been frustrated.  Please contact our customer service department so we can assist you better.  Customer service can be reached at or by calling 800-292-4794.

Best wishes,

Gina Ciagne, CLC

Photo of Gina Ciagne

Gina Ciagne

Certified Lactation Counselor