They are lightly carbonated for a smooth, mild mouthfeel. Reviewers commonly describe the carbonation as mild and not overbearing.
Product labeling indicates the drinks are vegan and gluten-free, note no artificial colors, and one product bullet states they do not contain any of the nine major allergens.
Product notes explicitly advise these drinks are not recommended for children, people sensitive to caffeine, pregnant women, or nursing mothers.
The drinks list 200 mg of caffeine and B vitamins—commonly B5, B6, and B12 (with B3 listed in one description). Some listings also mention L‑theanine as an ingredient associated with a steadier boost.
Some product descriptions state the drinks provide a "steady energy boost without jitters" and highlight added B vitamins and low- or zero-sugar formulations; review summaries also report few jitters or crashes for several flavors.