Earlier in the day, Milano, 42, tweeted that 10 ounces of pumped breast milk was taken away upon landing at Heathrow. She said in her statement that "breastfeeding my children has been one of the greatest joys of my life."
"Every ounce of milk I'm able to produce for my child is nothing short of a miracle and to watch that milk be thrown away without any regard for my baby, was heartbreaking," she said.
Milano gave birth to her daughter, Elizabella, in September. A representative for the airport responded to the actress's tweet, explaining that regulations stipulate that had she had her daughter with her, she could have kept the milk.
"If you are not travelling with a baby / infant all your liquids must comply with the 100ml rule," the guideline reads. "Spare supplies should be packed in hold baggage."
Milano said in the statement provided by her rep that she didn't blame security at the airport, since employees were "following orders to keep us all safe." She added that she hoped the policy received a "thoughtful reconsideration."
"I'm glad this has started a dialogue," she said. "My only hope is to make things easier for moms, breastfeeding and formula feeding moms, everywhere."