A can of C4 Energy Starburst Lemon. This is unique and different from any lemon or sour tart beverage I've had before. It is a carbonated drink though. Seems to have compactness to a piece of Starburst Lemon chew. Though it might be due to scent from packaging box material. This also happened 8 years ago when I drank from Monster Energy Ultra Citron that was mailed to me and there was a noticeable taste difference. Its taste is nothing like Amp Energy Lightning lemonade or Bang Energy Lemon Drop, and fortunately miles away from Bang Energy Key Lime Pie. All three of those drinks are long gone. But it's my first C4 lemon flavor of the type, so the later cans might have the difference in taste or my tongue could adept to the fruit candy sense. I really hope my tongue isn't suffering from old age in reduction of all I taste or the sensitive toothpaste I've been using in the span of several days.