I actually found that with DS2 who I had 2 cups/day with was a better sleeper & no reflux, but DS1 who I tried to stay off was a worse sleeper & had reflux, so IMHO if I had a third, I'd stick with my 2 cups/day (instant)... my cousin drank 3-4 instant coffees a day with all 5 of her children & BF them past 18months & all of hers were fantastic sleepers & grown up to be beautiful successful adults.