Steaz Energy Zero Calorie Berry Flavor

I feel like there should be a Venn diagram for this drink. It has so many things stacked against it that are intertwined into one. It is a natural diet energy drink. All three of these things tread in dangerous territory, but the three mixed together in one can could be monumentally bad. Luckily, Steaz has a good track record so I'm not that worried.

First sip: eh.....
Second sip: It has a strong tea taste with a chalky berry aftertaste.
Third sip and beyond: It definitely doesn't have a battery acid energy drink taste, which is good. I don't know if it's the lack of sugar, or the 0 calorie natural sweeteners in this but this is definitely not sweet enough for my taste. It has a real bitter taste. People who love green tea and yerba mate would probably love this, but not me.