On average, the drink size button chosen does not determine the amount of caffeine in your beverage. The amount of caffeine in L'OR Espresso and L'OR coffee capsules varies per variety. This figure depends on the quantity of coffee contained in the capsule, the quantity of Robusta used in the blend (Robusta contains higher levels of caffeine than Arabica) and natural fluctuations in the coffee according to the season (however, this has a limited effect)