Carol, same thing happened to my hairdresser but she said she was fined $500. You got away good!
When we travel in USA we fly out with a square cooler that keeps cold 36 hours. Knowing that TSA is sure to check, we put a thin carry gym type bag at the bottom then a garbage bag filled with our underwear socks etc.
Upon arrival in a state we rent a car move garbage bag into the stored gym bag stop at Walmart buy water, cheese, etc for the road and fill that cooler.