I've been drinking coffee for close to 20 years now. Sometimes I have to cut back on how many cups I drink a day for a week or two to get back to it waking me up, but overall it's been good to me. On the other hand, Talking Rain has a new and potentially dangerous (for me, not for the market in general) product. It's a non-sparkling energy water with 100mg of caffeine per can, along with 56mg of green tea extract, no sugar or carbs (sucralose is their sweetener of choice), zero calories, and 15%DV of vitamins B3, B5, B6, and B12. I don't know how many flavors this is available in, but the one I had a can of is Pomegranate Blueberry, and it goes down smooth as hell. Microsoft is stocking it in their free beverage fridges. If I'm not careful, I could be in for some serious over-caffeination.