Dunkin' Refreshers contain caffeine primarily from their green tea extract base. The caffeine content varies by size:

• Small (16 oz): approximately 66 mg of caffeine
• Medium (24 oz): approximately 99 mg of caffeine
• Large (32 oz): approximately 132 mg of caffeine

This caffeine amount is less than a typical cup of coffee but provides a moderate energy boost. The caffeine comes both from the brewed green tea and the green tea extract in the fruit concentrate, making it impossible to have a caffeine-free Refresher unless you substitute the green tea base with lemonade or another non-caffeinated liquid

. For perspective, a medium Refresher's caffeine content is similar to a medium hot black tea at Dunkin' but much lower than their coffee or energy drinks