Recipe

• 1 rehydration sachet

• 200ml water

Stir with ice until the powder is completely dissolved, and then strain into a cocktail glass. Add a thin slice of lime for extra decoration and vitamin C.

A slightly odd taste, with more salt than I'm accustomed to in anything but a margarita. Its smooth savoury sweetness is reminiscent of bananas, but nothing like as pleasant.

Claire had a headache, and that headache went away after she drank this. It's the opposite of most cocktails in that respect.