Interesting that ice cubes made it through security. I wonder if it was a "mistake"?
It's funny that after many years of using re-usable and re-fillable bottles, often filling them halfway and freezing, I never realized that I was bothered by sweating bottles. It was just something I put up with by wrapping a cloth around the bottle, thinking I was adding to the insulation.
Now I realize how nice it is to have a no-sweat (but not a Hydroflask) bottle. It is so weird to be sipping very cold water and to be holding the vacuum insulated bottle that feels like room temperature in my hand.