Water Joe (caffeinated water) has more caffeine than Pepsi on both counts: 70mg per 16.9 oz bottle against 38mg per 12 oz can, and about 4mg per fluid ounce against 3. The serving sizes differ, so the table below shows both ways of counting.
Water Joe (caffeinated water) vs Pepsi: the numbers
| Water Joe (caffeinated water) | Pepsi | |
|---|---|---|
| Caffeine per serving | 70mg per 16.9 oz bottle | 38mg per 12 oz can |
| Caffeine per fl oz | 4.1mg | 3.2mg |
| Servings to reach 400mg (FDA context) | 5.7 | 10.5 |
Sources: Water Joe (caffeinated water)'s figure is verified in our Water Joe (caffeinated water) caffeine guide against Water Joe / Caffeine Informer (source); Pepsi's figure is verified in our Pepsi guide against Caffeine Informer (source).
Which one should you pick?
Pick Pepsi when you want the lighter dose or a slower ramp, and Water Joe (caffeinated water) 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
- Water Joe (caffeinated water): the full caffeine guide
- Pepsi: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Water Joe (caffeinated water) or Pepsi have more caffeine? Water Joe (caffeinated water): 70mg per 16.9 oz bottle versus 38mg per 12 oz can for Pepsi.
Which is stronger per ounce? Water Joe (caffeinated water), at about 4.1mg per fluid ounce versus 3.2mg for Pepsi.
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