Water Joe (caffeinated water) has more caffeine than Coca-Cola Classic on both counts: 70mg per 16.9 oz bottle against 34mg 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 Coca-Cola Classic: the numbers
| Water Joe (caffeinated water) | Coca-Cola Classic | |
|---|---|---|
| Caffeine per serving | 70mg per 16.9 oz bottle | 34mg per 12 oz can |
| Caffeine per fl oz | 4.1mg | 2.8mg |
| Servings to reach 400mg (FDA context) | 5.7 | 11.8 |
Sources: Water Joe (caffeinated water)'s figure is verified in our Water Joe (caffeinated water) caffeine guide against Water Joe / Caffeine Informer (source); Coca-Cola Classic's figure is verified in our Coca-Cola Classic guide against Caffeine Informer (source).
Which one should you pick?
Pick Coca-Cola Classic 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
- Coca-Cola Classic: 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 Coca-Cola Classic have more caffeine? Water Joe (caffeinated water): 70mg per 16.9 oz bottle versus 34mg per 12 oz can for Coca-Cola Classic.
Which is stronger per ounce? Water Joe (caffeinated water), at about 4.1mg per fluid ounce versus 2.8mg for Coca-Cola Classic.
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