SToK Extra Bold cold brew has more caffeine than Starbucks bottled Frappuccino (Mocha) on both counts: 170mg per 12 oz serving against 105mg per 13.7 oz bottle, and about 14mg per fluid ounce against 8. The serving sizes differ, so the table below shows both ways of counting.
SToK Extra Bold cold brew vs Starbucks bottled Frappuccino (Mocha): the numbers
| SToK Extra Bold cold brew | Starbucks bottled Frappuccino (Mocha) | |
|---|---|---|
| Caffeine per serving | 170mg per 12 oz serving | 105mg per 13.7 oz bottle |
| Caffeine per fl oz | 14.2mg | 7.7mg |
| Servings to reach 400mg (FDA context) | 2.4 | 3.8 |
Sources: SToK Extra Bold cold brew's figure is verified in our SToK Extra Bold cold brew caffeine guide against SToK FAQ (source); Starbucks bottled Frappuccino (Mocha)'s figure is verified in our Starbucks bottled Frappuccino (Mocha) guide against PepsiCo product facts (source).
Which one should you pick?
Pick Starbucks bottled Frappuccino (Mocha) when you want the lighter dose or a slower ramp, and SToK Extra Bold cold brew 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
- SToK Extra Bold cold brew: the full caffeine guide
- Starbucks bottled Frappuccino (Mocha): the full caffeine guide
- The verified caffeine database
FAQ
Does SToK Extra Bold cold brew or Starbucks bottled Frappuccino (Mocha) have more caffeine? SToK Extra Bold cold brew: 170mg per 12 oz serving versus 105mg per 13.7 oz bottle for Starbucks bottled Frappuccino (Mocha).
Which is stronger per ounce? SToK Extra Bold cold brew, at about 14.2mg per fluid ounce versus 7.7mg for Starbucks bottled Frappuccino (Mocha).
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.