Children should not drink milk powder more than two hours after it has been brewed, which can easily cause it to deteriorate. If the child eats it, it will easily cause gastrointestinal discomfort, such as nausea, vomiting, diarrhea and other conditions. However, if the brewed milk powder, the child did not eat a bite, you can put it in the refrigerator for twenty-four hours, and when the child eats it can be warmed up with a milk warmer or with hot water and then give it to the child, but it is best to finish the milk powder within an hour after giving it to the child, if the child does not eat it all at once, it is generally heated and taken by the child within an hour, but if it is more than an hour, it is best to pour it out directly so as not to give The child is likely to eat it to cause adverse effects. Note that if the milk powder is brewed, it cannot be kept on the milk warmer, which can easily cause the milk powder to deteriorate, and also easily cause bacteria to grow, which can easily cause diarrhea in children.