Water is one of the most essential and healthy drinks that there is. Some nutritionists believe that it's good to drink around 8 glasses of water each day. Other people are into herbal teas of all sorts - green, peppermint, chamomile, to name a few. Still others say that a glass of red wine a day is good for your health, especially for your heart (though caution needs to be taken due to the potential damage caused by excessive alcohol).
Another drink developed recently by scientists at the University of Queensland is a tea called Spearole. Each cup contains the health value (antioxidants) of one glass of red wine, and three cups of tea (spearmint, olive and green). It's very tasty too. I can drink to that!