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Once I read a suggestion saying that frozen "liquids" are not subject to the 100 ml restriction of security checks in airports. I've found other references of this googling, but they all refer to TSA (I assume only hold in the US).

Is it true then that it's possible to carry frozen fluids in your hand luggage, in larger quantities than 100 ml?

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5  
Just about anything is a “frozen” liquid, in a sense. –  Relaxed May 19 at 14:57
2  
And just about anything may be rejected at the security check depending on the officer's subjective mood. In Munich, I've been rejected to bring butter as cabin luggage with the explanation that it may melt and hence be forbidden because it is liquid. It didn't really help to solve the situation that I tried to explain that most of the other items I had in my rucksack (including the rucksack itself) would also melt and become liquid if the temperature is high enough. –  Tor-Einar Jarnbjo May 19 at 15:18
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Please don't do this and get caught, last thing we want that US turn off all ACs in their airports "for security reasons". –  MeNoTalk May 19 at 15:27
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up vote 12 down vote accepted

As you saw on the official TSA Blog, it says explicitly

"Frozen gels/liquids are permitted if required to cool medical and infant/child exemptions. Frozen gels/liquids for any other purpose are not permitted."

So it's off limits in the USA.

The UK for example states the definition of liquid by matter of subject (such as all drinks etc) instead of their shape or status (frozen etc). So it is safe to assume that drinks, frozen or not, are not permitted.

Same goes for the EU.

So in other words, no. You cannot take a drink into the airplane, just because it's frozen. It's still a "drink". You will have to live with the fact that the regulations are not using terminology that matches what we learn in physical science.

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8  
You will have to live with the fact that the regulations are not using terminology that matches what we learn in physical science –  clabacchio May 19 at 16:03
    
My partner was told by TSA that he could have kept his Philly cream cheese in his carry-on IF it had been frozen. He was flying LAX-ATL-JHB. –  mkennedy May 21 at 0:26
    
@mkennedy We have to assume that not all TSA agents are 100% familiar with their own rules. –  uncovery May 21 at 0:38
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