I tried all the thirst-quenching supermarket drinks from pickle juice to coconut water – which one keeps you cool best?

WITH another heatwave hitting the UK it is crucial to stay hydrated. The advice is to sip liquids little and often, especially if sweating a lot. But water isn’t always the best choice when you are also losing salt and electrolytes in perspiration. Rehydration has been big news at this World Cup, where players, including…

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