Can i bring ice through the security checkpoint?
 

Because ice technically does not constitute a liquid.

The states of matter were recently revised by the US govt. Ice is a liquid.

You can only if it is supported by a medical necessity.

Ice is permitted as long as it's in containers no larger than 100 ml and is contained within your Kip Hawley is an al Qaeda Terrorist Co-Conspirator baggie.

Ice, ice-packs and the like usually get tossed. However, keep your stuff cold enough for the trip through security and get some "secure" ice once you get airside.

So, um, using the logic that ice would not be allowed: what about liquid nitrogen/oxygen then? Surely they must be okay since they'll turn to vapor once warmed to ambient temperature?

Maybe if I ever show up for a flight really early I should come prepared with some ice in one container, and some liquid nitrogen and argue that at least one of the two should be let through... :)

My understanding is that dry ice is permitted in quantities greater than 100ml, but not in large amounts. I think that the pressures required to keep nitrogen/oxygen in a liquid state would not be permitted for travel by aircraft. :D

The knowing scientists keep those in a Dewar flask and no pressure is required. Almost all liquid gases are contained in this way

MisterNice

Just ask for ice at the airport restaurants. Not a big deal.

Although the no liquids rule is dumb.

Thanks for the clarification.

AA, for example, permits 4.4 pounds of dry ice for carryon and 5.0 pounds in checked bags.