How about not confiscated?

Was in New Orleans for the Jazz Festival.

My wife gets headaches, so we brought an ice bag like this one:

In the morning we fill it with ice in our hotel, and toss it in a backpack. We empty the water at the end of the day.

On the last day, we gather our luggage and gear and head to the airport.

When we got home I realized that my backpack went through the airport scanners with the ice bag full of water. Probably about a quart.

I think that might be above what's allowed.