I never drink alcohol (or caffeine) on long haul plane flights -- dehydration is really really awful, and you dehydrate so quickly on planes with the air condit

I never drink alcohol (or caffeine) on long haul plane flights -- dehydration is really really awful, and you dehydrate so quickly on planes with the air conditioning going all the time. But then again my "long haul" flights are 20hrs+, not 10.