On the same TSA page noting the ban on lighters is to be lifted August 4, is another notice that breast milk is good to go as well.
From their site:
Q. Why is breast milk not a threat?
A. Breast milk is a medical necessity and it is being classified as such. It must be declared at the checkpoint.Q. Do passengers carrying breast milk need to taste it to prove it is not a liquid explosive?
A. No. We will not ask a traveler to taste breast milk.
The second question is priceless.
I can’t believe it was even questioned.