Actually, I too think lawa has a point. I am pretty sure that the body temperature does increase during cooking...as a matter of fact, mine does! Not tremendously, but still. and therefore the milk of a breastfeeding mother would be warmer at that point. Now, is this bad for the baby? I do not know...but if one were in a tropical, non airconditioned environment, there may be a chance of overheating for the baby.