Starbucks bottled Frappuccino (Mocha) has more caffeine than Sunkist Zero Sugar on both counts: 105mg per 13.7 oz bottle against 19mg per 12 oz can, and about 8mg per fluid ounce against 2. The serving sizes differ, so the table below shows both ways of counting.
These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.
Starbucks bottled Frappuccino (Mocha) vs Sunkist Zero Sugar: the numbers
| Starbucks bottled Frappuccino (Mocha) | Sunkist Zero Sugar | |
|---|---|---|
| Caffeine per serving | 105mg per 13.7 oz bottle | 19mg per 12 oz can |
| Caffeine per fl oz | 7.7mg | 1.6mg |
| Servings to reach 400mg (FDA context) | 3.8 | 21.1 |
Sources: Starbucks bottled Frappuccino (Mocha)'s figure is verified in our Starbucks bottled Frappuccino (Mocha) caffeine guide against PepsiCo product facts (source); Sunkist Zero Sugar's figure is verified in our Sunkist Zero Sugar guide against Caffeine Informer (source).
The concentration gap is the striking part: Starbucks bottled Frappuccino (Mocha) packs roughly 5 times the caffeine per ounce. Sipping speed matters at that density; a 13.7 oz bottle finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Sunkist Zero Sugar when you want the lighter dose or a slower ramp, and Starbucks bottled Frappuccino (Mocha) 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
- Starbucks bottled Frappuccino (Mocha): the full caffeine guide
- Sunkist Zero Sugar: the full caffeine guide
- The verified caffeine database
FAQ
Does Starbucks bottled Frappuccino (Mocha) or Sunkist Zero Sugar have more caffeine? Starbucks bottled Frappuccino (Mocha): 105mg per 13.7 oz bottle versus 19mg per 12 oz can for Sunkist Zero Sugar.
Which is stronger per ounce? Starbucks bottled Frappuccino (Mocha), at about 7.7mg per fluid ounce versus 1.6mg for Sunkist Zero Sugar.
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.