Starbucks London Fog has more caffeine than Twisted Tea on both counts: 40mg per 16 oz grande (40mg at every size) against 30mg per 12 oz bottle, and about 2mg per fluid ounce against 2. The serving sizes differ, so the table below shows both ways of counting.
Starbucks London Fog vs Twisted Tea: the numbers
| Starbucks London Fog | Twisted Tea | |
|---|---|---|
| Caffeine per serving | 40mg per 16 oz grande (40mg at every size) | 30mg per 12 oz bottle |
| Caffeine per fl oz | 2.5mg | 2.5mg |
| Servings to reach 400mg (FDA context) | 10.0 | 13.3 |
Sources: Starbucks London Fog's figure is verified in our Starbucks London Fog caffeine guide against Starbucks nutrition listing (source); Twisted Tea's figure is verified in our Twisted Tea guide against brand data / Caffeine Informer (source).
Which one should you pick?
Pick Twisted 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
- Twisted Tea: the full caffeine guide
- The verified caffeine database
FAQ
Does Starbucks London Fog or Twisted Tea have more caffeine? Starbucks London Fog: 40mg per 16 oz grande (40mg at every size) versus 30mg per 12 oz bottle for Twisted Tea.
Which is stronger per ounce? Starbucks London Fog, at about 2.5mg per fluid ounce versus 2.5mg for Twisted 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.