Suntory Boss Coffee vs Starbucks bottled Frappuccino (Mocha): which has more caffeine?

Suntory Boss Coffee has more caffeine than Starbucks bottled Frappuccino (Mocha) on both counts: 140mg per 8 oz can against 105mg per 13.7 oz bottle, and about 18mg per fluid ounce against 8. The serving sizes differ, so the table below shows both ways of counting.

Suntory Boss Coffee vs Starbucks bottled Frappuccino (Mocha): the numbers

Sources: Suntory Boss Coffee's figure is verified in our Suntory Boss Coffee caffeine guide against Caffeine Informer (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 Suntory Boss Coffee 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

• Suntory Boss Coffee: the full caffeine guide
• Starbucks bottled Frappuccino (Mocha): the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does Suntory Boss Coffee or Starbucks bottled Frappuccino (Mocha) have more caffeine? Suntory Boss Coffee: 140mg per 8 oz can versus 105mg per 13.7 oz bottle for Starbucks bottled Frappuccino (Mocha).

Which is stronger per ounce? Suntory Boss Coffee, at about 17.5mg per fluid ounce versus 7.7mg for Starbucks bottled Frappuccino (Mocha).