I mean, some brands such as "Aha Sparkling Water" literally sell them as caffeinated seltzer instead of energy drinks. https://www.caffeineinformer.com/caffein

I mean, some brands such as "Aha Sparkling Water" literally sell them as caffeinated seltzer instead of energy drinks. https://www.caffeineinformer.com/caffeine-content/aha-sparkling-water https://www.caffeineinformer.com/caffeine-content/aha-sparkl...