A Dunkin' Refresher contains the following approximate caffeine amounts based on size:
- Small (16 oz): About 66 milligrams of caffeine
- Medium (24 oz): About 99 milligrams of caffeine
- Large (32 oz): About 132 milligrams of caffeine
The caffeine content primarily comes from the green tea base used in these drinks, as well as green tea extract found in the fruit concentrate. This caffeine level is less than a typical cup of coffee but more than many iced teas, making Refreshers a moderate caffeine option for a cooling and energizing drink.
