C4 isn't a liquid so it isn't on their radar (luckily dogs & machines can detect it). When travelling back to the UK from France, they wouldn't let me take a bi

C4 isn't a liquid so it isn't on their radar (luckily dogs & machines can detect it). When travelling back to the UK from France, they wouldn't let me take a bike bottle with 80ml of water in it (for my medication), the bottle had measurements on the side for adding supplements. But, it was ok to carry some cheese for my mother. The explosive element of C4 is RDX, RDX causes seizures when ingested in small doses. Plus, a key ingredient is Nitric acid - I don't fancy trying any. https://en.wikipedia.org/wiki/RDX#Toxicity https://en.wikipedia.org/wiki/RDX#Toxicity Interesting fact: The US produced 15,000 tons of RDX per month during World War 2, gives you some idea of the level of destruction during that period.