Often times you may encounter a situation where your baby doesn’t want to drink the formula after it’s been made. How many hours can I keep the powdered milk? If the baby drinks part of the milk powder after it is made, then the remaining part, if it is at room temperature, can be stored for 1 hour. If your baby wants to drink milk after 1 hour or more, you should re-formulate the milk and pour out the original milk powder. Because after drinking a part of it, the milk powder may have been contaminated and bacteria may grow in it. If the milk powder is brewed, the baby did not drink, it is best to recommend room temperature should not be more than 2 hours, 2 hours later, the milk powder may also breed bacteria, causing the baby to bloat, vomiting, or even fever and so on. If the brewed milk powder into the refrigerator, it is recommended to store 24 hours, 24 hours later if the baby wants to drink, you should use the heating method to warm the milk, before you can give the baby to eat.