Starbucks Strawberry Acai Refresher contains 45 mg of caffeine per Grande 16 oz (473 ml / 16 oz). That is about 47% of the caffeine in a typical 8 oz cup of brewed coffee (about 95 mg). Concentration: 9.5 mg per 100 ml.
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Starbucks Strawberry Acai Refresher Caffeine Content by Serving
Figures are for Strawberry Acai Refresher (Starbucks).
| Serving | Volume | Caffeine | Per 100 ml | Level |
|---|---|---|---|---|
| Grande 16 oz | 473 ml / 16 oz | 45 mg | 9.5 mg | Low |
Source: caffeine figures from Caffeine Informer (values sourced from starbucks.com), accessed 2026-06-11. Values can vary by batch, location, and preparation; check the label or the source for the latest figures.
How Starbucks Strawberry Acai Refresher Compares to Coffee
At 45 mg per Grande 16 oz, Starbucks Strawberry Acai Refresher delivers about 47% of the caffeine in a typical 8 oz cup of brewed coffee (about 95 mg). For a wider comparison across drinks, try the caffeine comparison tool or browse the full caffeine database.
When to Stop Drinking Starbucks Strawberry Acai Refresher Before Bed
A Grande 16 oz of Starbucks Strawberry Acai Refresher (45 mg) stays under the 50 mg sleep-ready threshold from the first sip, so a normal serving is unlikely to delay sleep on its own. Multiple servings stack, though: caffeine's median half-life is about 5 hours, so a second or third serving in the afternoon can still add up past 50 mg by bedtime.
The Starbucks Strawberry Acai Refresher sleep cutoff page has last-call times for four bedtimes, and the caffeine half-life calculator personalizes the curve to your metabolism.
