Rockstar Original has more caffeine than Sparkling Ice +Caffeine: 160mg vs 70mg in the same 16 oz can. That is a 90mg gap, and since the cans match, the per-serving number is the whole story.
Sparkling Ice +Caffeine vs Rockstar Original: the numbers
| Sparkling Ice +Caffeine | Rockstar Original | |
|---|---|---|
| Caffeine per serving | 70mg per 16 oz can | 160mg per 16 oz can |
| Caffeine per fl oz | 4.4mg | 10.0mg |
| Servings to reach 400mg (FDA context) | 5.7 | 2.5 |
Sources: Sparkling Ice +Caffeine's figure is verified in our Sparkling Ice +Caffeine caffeine guide against Caffeine Informer (source); Rockstar Original's figure is verified in our Rockstar Original guide against Rockstar product page (source).
Which one should you pick?
Pick Sparkling Ice +Caffeine when you want the lighter dose or a slower ramp, and Rockstar Original when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.
Related reading
- Sparkling Ice +Caffeine: the full caffeine guide
- Rockstar Original: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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Gear from this guide
FAQ
Does Sparkling Ice +Caffeine or Rockstar Original have more caffeine? Rockstar Original: 160mg per 16 oz can versus 70mg per 16 oz can for Sparkling Ice +Caffeine.
Which is stronger per ounce? Rockstar Original, at about 10.0mg per fluid ounce versus 4.4mg for Sparkling Ice +Caffeine.
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