I think I can probably make it alive and well to the end of my Tube journey without a bottle of water in my bag, thanks.pic.twitter.com/SrN4bBDukR
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Sadly, yes
And besides, every day people use the tube for the first time. And they don’t always know how hot and stuffy it gets.
It doesn’t hurt anyone though, does it?
In this world of ever increasing PC where people aren't allowed to think for themselves the answer to your question is YES YES YES
If they drink too much they can always use the toilet or even the empty bottle, recycling it's called 
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