Do you wake up in the morning and want a strong coffee to stimulate you? If you are thinking of drinking a… bucket of coffee, you are probably right. This is because something you may not be aware of is that an important factor that increases the caffeine content is the addition of water. It is known that whether a coffee is ‘heavy’ or ‘light’ is primarily due to its variety (eg Robusta beans are stronger than Arabica). However, the amount of water added during its preparation plays a catalytic role. And maybe not the way you think. A simple ristretto espresso, for example, may seem “compact” and you might think it is stronger than a lungo, but in fact it is exactly the opposite!