Starbucks Tripleshot vs Bottled Frappuccino: caffeine compared
Starbucks Tripleshot (15 oz) has 225 mg of caffeine, 115 mg more than Bottled Frappuccino (13.7 oz, 110 mg) — 2.0× as much per serving. Per fluid ounce, Starbucks Tripleshot is the stronger drink: 15.0 mg/oz versus 8.0 mg/oz.
| Starbucks Tripleshot | Bottled Frappuccino | |
|---|---|---|
| Serving | 15 oz | 13.7 oz |
| Caffeine per serving | 225 mg | 110 mg |
| Per fl oz | 15.0 mg | 8.0 mg |
| Share of 400 mg/day | 56% | 28% |
| Servings to reach 400 mg | 1.8 | 3.6 |
| Hours until under 50 mg | 10.8 h | 5.7 h |
| Last one for an 11 PM bedtime · standard (50 mg) | 12:09 PM | 5:19 PM |
| Last one for an 11 PM bedtime · sensitive (25 mg) | 7:09 AM | 12:19 PM |
| Share of the 200 mg pregnancy limit | 112% | 55% |
One serving of each, over 16 hours
Common questions
Which has more caffeine, Starbucks Tripleshot or Bottled Frappuccino?
Starbucks Tripleshot (15 oz) has about 225 mg versus 110 mg in Bottled Frappuccino (13.7 oz): 115 mg more, or 2.0× as much.
Which is stronger per ounce, Starbucks Tripleshot or Bottled Frappuccino?
Starbucks Tripleshot: about 15.0 mg per fl oz versus 8.0 mg for Bottled Frappuccino. Serving size decides the total you actually drink.
How many Bottled Frappuccino servings equal one Starbucks Tripleshot?
About 2.0 servings of Bottled Frappuccino (13.7 oz) match the caffeine in one Starbucks Tripleshot (15 oz).
When should I stop drinking Starbucks Tripleshot or Bottled Frappuccino before bed?
For an 11 PM bedtime with a 50 mg limit and a 5-hour half-life: last Starbucks Tripleshot by 12:09 PM, last Bottled Frappuccino by 5:19 PM. Half-life varies from about 1.5 to 9.5 hours between people.
Method
Caffeine per labeled serving, from the same drink table every calculator here uses (FDA/USDA reference amounts and manufacturer labels; see caffeine content of every drink). Brewed drinks vary batch to batch, so read these as typical values. Decay uses a 5-hour average half-life with a 45-minute absorption ramp; cutoff = bedtime − 5 h × log₂(dose ÷ limit). Percentages use the FDA's 400 mg/day figure for healthy adults and the 200 mg/day limit ACOG gives for pregnancy.
Source — Starbucks Tripleshot: CSPI caffeine chart (Starbucks Tripleshot Energy, 15 oz), checked 2026-10-13.
Source — Bottled Frappuccino: CSPI caffeine chart (Starbucks Frappuccino, Coffee, 13.7 oz), checked 2026-10-13.