The ingredients in coconut water are way more effective at hydrating the human body than those of sports and energy drinks. Unlike sports drinks that contain high amounts of sugar, Coconut water contains double the amount of potassium and only 5mg of natural sugars per glass.
Not only the most (natural) effective way of hydration, but also a killer hangover cure. Not only the hydration benefits but its also great at helping an upset stomach.
On a post WOD scenario, your body digests and absorbs protein so much faster and easier when there is also carbohydrates consumed as well. A protein shake with coconut water is the perfect balance of protein and carbs (not to mention the rehydration benefits) for post workout consumption.