The caffeine content in a Starbucks bottled Frappuccino varies by flavor and bottle size, but the most common size now is a 13.7 fluid ounce bottle. Here are key details:

• The average caffeine content in a 13.7 fl oz Starbucks bottled Frappuccino is about 110 mg of caffeine, which is roughly 8 mg of caffeine per fluid ounce

• Specific flavors have different caffeine levels, for example:
  • Coffee flavor: around 130 mg caffeine per 13.7 oz bottle
  • Mocha flavor: about 110 mg
  • Caramel flavor: about 90 mg
  • Vanilla flavor: about 75 mg
  • Some lighter or specialty flavors have less caffeine (e.g., Pumpkin Spice 45 mg in 9.5 oz)

• The older 9.5 oz bottles typically contained around 90 mg of caffeine on average, but the newer, larger 13.7 oz bottles have slightly more caffeine overall due to the increased volume

In summary, if you have a standard 13.7 oz Starbucks bottled Frappuccino, expect approximately 110 mg of caffeine , with some variation depending on the flavor. The coffee-flavored version has the highest caffeine content at about 130 mg per bottle