So what exactly is the deal with TSA and pumping and breastfeeding moms? Looks like the post 9/11 rule, the 3-1- 1 rule, that all passengers are allowed 3.4-ounce bottles of liquids in a 1-quart size, clear plastic bag - doesn't apply to breast milk. Yes! One less thing to worry about as I carry my infant through a super crowded and never long enough, Atlanta connection. Although it’s permitted, here are a few things to remember to make getting through TSA easier.