I was recently reminded of the importance of water, when the new Chinese International students who are living with us, went on a covert night mission to buy bottled water, not liking the taste of Peterborough's tap water. They were driven by an inner need (thirst) to stay hydrated, but cultural and language barriers prevented them from asking for what they needed. Many of my patients can easily list how many litres of water they drink daily, carrying around an ample supply