Water is good in general. For juices I really like the obvious ones like orange, apple, grape, etc., but also I love me a good pomegranate, cranberry, etc. and then there's this truly evil Ocean Spray flavor called "Cran-Grape" that's very clearly unhealthy for you but also oh my god it's so good. It tastes like they took a fruit snack and made it into a liquid. Every now and then I treat myself and get a six pack of those mini bottles or I just get one of those big deals.