We like to let all parents know that TSA is very likely to do special inspections on the coolers - specifically the cooling units inside - since they don't see them every day and might be curious. The cooling units use evaporation technology and don't contain any hazardous materials like dry ice - which is usually their main concern.
Be prepared and allow extra time for TSA inspection. Just know that you are not required to put your breast milk through the X-ray machine, but you and your luggage will be subject to additional screening.
BEFORE YOU TRAVEL:
Parents can contact TSA Cares to inform TSA that they will be traveling with breast milk and a Milk Stork cooler. A specially trained representative provides information about screening that is relevant to the travelers’ specific disability or medical condition (i.e. transporting breast milk).
Parents can also download and print a TSA notification card to inform the screening agent that they are traveling with breast milk.
AT THE AIRPORT:
Should a TSA Agent inform a parent that the cooler and/or breast milk is not permitted through screening, it is recommended to request a Supervisory TSA Officer and/or Passenger Support Specialist for assistance with getting through security. Milk Stork coolers can and should be allowed through TSA.
AFTER TRAVEL:
Provide feedback for TSA, positive or negative, via the TSA contact form.
A couple of valuable resources are:
Milk Stork's Airport Security Guide
https://www.tsa.gov/travel/special-procedures/traveling-children