DH and I drink nice coffee in the morning. We grind beans and make it in a stove-top coffee maker - it's very strong. We would usually have 2 pots each in the morning (the pot is described as 3 cup) We don't like instant coffee so haven't got any. DS is 16 and has started hammering the coffee - he gets in from school and has one pot, then he has another about an hour or so later. It doesn't seem to stop him sleeping but it really doesn't seem healthy to me - I think he would have 5 pots a day if we let him. Are there any ill-effects?