Hi Mark
I just wanted to add that I have flown the JFK-STT twice with a carry-on Polar Bear cooler (no liquids or ice needed if packed as stated by the above posters). We have never been questioned at JFK. We'll be doing it again in 58 days. Have to say I hate flying out of JFK but the price beats Newark by hundreds of dollars. I am just 25 minutes south of you and I find getting to JFK brutal. Enjoy your trip.