Water may be life's best friend, but it's the friend in the middle of the table who doesn't say much. The one who always needs hoisting up at festivals*, you know the one. We've just given that friend a new lease of life, simply by introducing them to some leftover watermelon slices, lemon, mint leaves and a spark of Himalayan salt. Give them a few hours or so to get to know each other and you too will be conversing like a well infused, hydrated human. *Stand on the bottle for added festival height.