Rockstar Punched carries more total caffeine per serving (240mg per 16 oz can vs 180mg per 12 oz can), but ounce for ounce Bloom Energy is actually the stronger drink at about 15mg per fluid ounce against 15. Which one "has more caffeine" depends on whether you measure the container or the concentration.
Bloom Energy vs Rockstar Punched: the numbers
| Bloom Energy | Rockstar Punched | |
|---|---|---|
| Caffeine per serving | 180mg per 12 oz can | 240mg per 16 oz can |
| Caffeine per fl oz | 15.0mg | 15.0mg |
| Servings to reach 400mg (FDA context) | 2.2 | 1.7 |
Sources: Bloom Energy's figure is verified in our Bloom Energy caffeine guide against Caffeine Informer (source); Rockstar Punched's figure is verified in our Rockstar Punched guide against Caffeine Informer (source).
Which one should you pick?
Pick Bloom Energy when you want the lighter dose or a slower ramp, and Rockstar Punched 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
- Bloom Energy: the full caffeine guide
- Rockstar Punched: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Bloom Energy or Rockstar Punched have more caffeine? Rockstar Punched: 240mg per 16 oz can versus 180mg per 12 oz can for Bloom Energy.
Which is stronger per ounce? Bloom Energy, at about 15.0mg per fluid ounce versus 15.0mg for Rockstar Punched.
Comparing caffeine? The caffeine comparison tool puts hundreds of drinks side by side, and the caffeine curfew calculator can check your cutoff time for tonight.