Only you can decide if having 6 espressos worth of caffeine in one sitting is a good idea* ;)
Stove tops are designed so that you have to fill them to capacity to get the correct character of coffee produced. That is why they come in different sizes eg, if you want 3 cups you dont use the 6 cup machine filled to half capacity....you use the 3 cup machine! Otherwise, the coffee is not brewed properly.
Hope that helps.
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