So I took Agua Enerviva for a test drive at school for 2 days and here's what I think. The days that I drank Agua Enerviva, I did feel more alert and focused on my school work. Of course I can't say that the drink was the only factor that contributed to this, but it's worth noting. Each bottle of Agua Enerviva contains 100 mg of caffeine, which is about as much as a cup of coffee. The drink isn't just low-cal, the price is relatively reasonable ($1.39 to $1.79 at most Target stores depending on where you live), especially for a natural product. And besides the fact that it's tasty, the most important thing was that I didn't feel jittery. So I will most likely continue to drink Agua Enerviva.
Pick up individual bottles at Target, or you can even have a 12-pack mailed to your house from Amazon. Don't worry, you won't miss the brightly colored bottles in the aisles! To find a store near you, visit their website and enter your zip code. So far I've tried the Orange Passion and Pomegranate Acai, but I don't think you can go wrong with your flavor selection.
To end this post, I have a funny story about my "caffeine overdose" during finals last semester. This is why you should be careful with your coffee intake. I drank a cup of coffee one evening so that I could stay up late to study. But then I couldn't sleep or even sit still! Then the next morning I woke up with a huge headache and my whole body was shaking. Instead of feeling calm and focused, I felt anxious. It wasn't a fun situation. So if I had something like Agua Enerviva at that time, I think I would have been better off!