Dunkin' Extra Charged (medium) carries more total caffeine per serving (252mg per 14 oz medium vs 230mg per 10 oz bottle), but ounce for ounce Chameleon Cold Brew (RTD) is actually the stronger drink at about 23mg per fluid ounce against 18. Which one "has more caffeine" depends on whether you measure the container or the concentration.
Chameleon Cold Brew (RTD) vs Dunkin' Extra Charged (medium): the numbers
| Chameleon Cold Brew (RTD) | Dunkin' Extra Charged (medium) | |
|---|---|---|
| Caffeine per serving | 230mg per 10 oz bottle | 252mg per 14 oz medium |
| Caffeine per fl oz | 23.0mg | 18.0mg |
| Servings to reach 400mg (FDA context) | 1.7 | 1.6 |
Sources: Chameleon Cold Brew (RTD)'s figure is verified in our Chameleon Cold Brew (RTD) caffeine guide against Caffeine Informer (source); Dunkin' Extra Charged (medium)'s figure is verified in our Dunkin' Extra Charged (medium) guide against Caffeine Informer (source).
Which one should you pick?
Pick Chameleon Cold Brew (RTD) when you want the lighter dose or a slower ramp, and Dunkin' Extra Charged (medium) 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
- Chameleon Cold Brew (RTD): the full caffeine guide
- Dunkin' Extra Charged (medium): the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Chameleon Cold Brew (RTD) or Dunkin' Extra Charged (medium) have more caffeine? Dunkin' Extra Charged (medium): 252mg per 14 oz medium versus 230mg per 10 oz bottle for Chameleon Cold Brew (RTD).
Which is stronger per ounce? Chameleon Cold Brew (RTD), at about 23.0mg per fluid ounce versus 18.0mg for Dunkin' Extra Charged (medium).
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.