Starbucks cold brew (grande) carries more total caffeine per serving (205mg per 16 oz grande vs 197mg per 13.7 oz bottle), but ounce for ounce Dunkin' Bottled Iced Coffee is actually the stronger drink at about 14mg per fluid ounce against 13. Which one "has more caffeine" depends on whether you measure the container or the concentration.
Dunkin' Bottled Iced Coffee vs Starbucks cold brew (grande): the numbers
| Dunkin' Bottled Iced Coffee | Starbucks cold brew (grande) | |
|---|---|---|
| Caffeine per serving | 197mg per 13.7 oz bottle | 205mg per 16 oz grande |
| Caffeine per fl oz | 14.4mg | 12.8mg |
| Servings to reach 400mg (FDA context) | 2.0 | 2.0 |
Sources: Dunkin' Bottled Iced Coffee's figure is verified in our Dunkin' Bottled Iced Coffee caffeine guide against Caffeine Informer (source); Starbucks cold brew (grande)'s figure is verified in our Starbucks cold brew (grande) guide against Starbucks menu data (source).
Which one should you pick?
Pick Dunkin' Bottled Iced Coffee when you want the lighter dose or a slower ramp, and Starbucks cold brew (grande) 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
- Dunkin' Bottled Iced Coffee: the full caffeine guide
- Starbucks cold brew (grande): the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Dunkin' Bottled Iced Coffee or Starbucks cold brew (grande) have more caffeine? Starbucks cold brew (grande): 205mg per 16 oz grande versus 197mg per 13.7 oz bottle for Dunkin' Bottled Iced Coffee.
Which is stronger per ounce? Dunkin' Bottled Iced Coffee, at about 14.4mg per fluid ounce versus 12.8mg for Starbucks cold brew (grande).
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.