Dunkin Refresher (medium) has more caffeine than Sprite on both counts: 99mg per 24 oz medium against 0mg per 12 oz can, and about 4mg 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.
Dunkin Refresher (medium) vs Sprite: the numbers
| Dunkin Refresher (medium) | Sprite | |
|---|---|---|
| Caffeine per serving | 99mg per 24 oz medium | 0mg per 12 oz can |
| Caffeine per fl oz | 4.1mg | 0.0mg |
| Servings to reach 400mg (FDA context) | 4.0 | n/a (caffeine-free) |
Sources: Dunkin Refresher (medium)'s figure is verified in our Dunkin Refresher (medium) caffeine guide against Tasting Table / Dunkin figures (source); Sprite's figure is verified in our Sprite guide against Caffeine Informer (source).
The concentration gap is the striking part: Dunkin Refresher (medium) packs roughly 412 times the caffeine per ounce. Sipping speed matters at that density; a 24 oz medium finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick Sprite when you want the lighter dose or a slower ramp, and Dunkin Refresher (medium) 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
- Dunkin Refresher (medium): the full caffeine guide
- Sprite: the full caffeine guide
- The verified caffeine database
FAQ
Does Dunkin Refresher (medium) or Sprite have more caffeine? Dunkin Refresher (medium): 99mg per 24 oz medium versus 0mg per 12 oz can for Sprite.
Which is stronger per ounce? Dunkin Refresher (medium), at about 4.1mg per fluid ounce versus 0.0mg for Sprite.
Barista Life runs on coffee people. Browse the Barista Life shop to support the site.