Starbucks London Fog has more caffeine than Snapple iced tea: 40mg vs 37mg in the same 16 oz grande (40mg at every size). That is a 3mg gap, and since the cans match, the per-serving number is the whole story.
Starbucks London Fog vs Snapple iced tea: the numbers
| Starbucks London Fog | Snapple iced tea | |
|---|---|---|
| Caffeine per serving | 40mg per 16 oz grande (40mg at every size) | 37mg per 16 oz bottle |
| Caffeine per fl oz | 2.5mg | 2.3mg |
| Servings to reach 400mg (FDA context) | 10.0 | 10.8 |
Sources: Starbucks London Fog's figure is verified in our Starbucks London Fog caffeine guide against Starbucks nutrition listing (source); Snapple iced tea's figure is verified in our Snapple iced tea guide against brand data / Caffeine Informer (source).
Which one should you pick?
Pick Snapple iced tea when you want the lighter dose or a slower ramp, and Starbucks London Fog 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
- Starbucks London Fog: the full caffeine guide
- Snapple iced tea: the full caffeine guide
- The verified caffeine database
FAQ
Does Starbucks London Fog or Snapple iced tea have more caffeine? Starbucks London Fog: 40mg per 16 oz grande (40mg at every size) versus 37mg per 16 oz bottle for Snapple iced tea.
Which is stronger per ounce? Starbucks London Fog, at about 2.5mg per fluid ounce versus 2.3mg for Snapple iced tea.
Comparing caffeine? The caffeine comparison tool puts hundreds of drinks side by side, and the caffeine curfew calculator can check your cutoff time for tonight.