Starbucks Doubleshot Espresso & Cream has more caffeine than Starry (lemon lime) on both counts: 120mg per 6.5 oz can against 0mg per 12 oz can, and about 18mg per fluid ounce against 0. The serving sizes differ, so the table below shows both ways of counting.
These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.
Starry (lemon lime) vs Starbucks Doubleshot Espresso & Cream: the numbers
| Starry (lemon lime) | Starbucks Doubleshot Espresso & Cream | |
|---|---|---|
| Caffeine per serving | 0mg per 12 oz can | 120mg per 6.5 oz can |
| Caffeine per fl oz | 0.0mg | 18.5mg |
| Servings to reach 400mg (FDA context) | n/a (caffeine-free) | 3.3 |
Sources: Starry (lemon lime)'s figure is verified in our Starry (lemon lime) caffeine guide against PepsiCo product facts (source); Starbucks Doubleshot Espresso & Cream's figure is verified in our Starbucks Doubleshot Espresso & Cream guide against Caffeine Informer / Starbucks nutrition (source).
The concentration gap is the striking part: Starbucks Doubleshot Espresso & Cream packs roughly 1846 times the caffeine per ounce. Sipping speed matters at that density; a 6.5 oz can finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Starry (lemon lime) when you want the lighter dose or a slower ramp, and Starbucks Doubleshot Espresso & Cream 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
- Starry (lemon lime): the full caffeine guide
- Starbucks Doubleshot Espresso & Cream: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
FAQ
Does Starry (lemon lime) or Starbucks Doubleshot Espresso & Cream have more caffeine? Starbucks Doubleshot Espresso & Cream: 120mg per 6.5 oz can versus 0mg per 12 oz can for Starry (lemon lime).
Which is stronger per ounce? Starbucks Doubleshot Espresso & Cream, at about 18.5mg per fluid ounce versus 0.0mg for Starry (lemon lime).
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