Fair enough, but as we get served water on board anyway (at least in J) how many gallons do people need to drink?
Perhaps it's my metabolism, but I might drink 200ml (if that) on a TATL, and none in transit. Maybe 100l on a subsequent transcon leg.
Is this the new H2Ophobia? "Keep hydrated at all costs"? How have I survived 72 years without filling myself with pints of water all the time? We never used to do that, so what's new?