In the 90's USA was sensible. I was flying with a thermos of hot coffee in my carry on. As soon as they took out the thermos and felt the heat radiating from the lid the agent said, "I don't think they would heat it", smiled and passed me thru.

Now when I fly I have to be careful. When they ask purpose of visit I say sightseeing. I used to say tourist, but with my accent that once caused alarm when the agent thought I said terrorist.

I am a strong believer in the "low-tech" solutions for this kind of thing. I seriously doubt the terrorist suicide bomber knows if drinking the explosive is going to prevent them from taking the mission to the end (ie. they will die in 5 min, in 30 min or in 24h), so they will start panicking when asked to drink from the bottle.

The US embassy in London do this. You can take liquids in, as long as you drink from them at security.

Was it just you? Or do they apply the same policy for every visitor with a bottle of liquid?

So if a suicide bomber can drink explosives, they will be fine. As long as it's not poisonous within a few hours, should be no issue.

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That is the way!