A standard Starbucks bottled Frappuccino contains about 110 mg of caffeine in a 13.7 fluid ounce (405 mL) bottle, which averages to approximately 8 mg of caffeine per ounce. This caffeine content is similar to a regular cup of black coffee

. The caffeine amount can vary slightly depending on the flavor:

• Coffee flavor: around 130 mg per 13.7 oz bottle
• Mocha and Dark Chocolate Brownie Oat Milk: about 110 mg
• Caramel: approximately 90 mg
• Vanilla: around 75 mg
• Pumpkin Spice: about 45 mg

These variations reflect differences in coffee content and ingredients across flavors

. In summary, if you pick up a typical 13.7 oz Starbucks bottled Frappuccino, expect roughly 110 mg of caffeine, with some flavors having a bit more or less.