The facedown of kitchen tap water vs bathroom tap water continues to rage throughout conversations, but what does science recommend? Let’s set the scene… you wake up in the middle of the night, there’s one thing you crave above all else: a sip of water, then it’s back to sleep. Through closed eyes, you clumsily reach out a tired arm over to the bedside table, feeling for anything resembling a drinking glass. You’ve found it, but then, your hopes are dashed. It’s empty. So, what do you do? You’re exhausted, but there’s no going to sleep until you get what you want. Do you head for the bathroom …