The bottle of milk powder is usually marked with how long it can be stored after opening the lid, but the time it can be stored varies from milk powder to milk powder, and it is usually best to consume the milk powder within a month after opening the lid, so as to ensure that the nutrients of the milk powder are not lost. If the milk powder has been placed more than a month later, try not to let the baby eat, because the milk powder will become damp and then clumped, will not give the baby’s body to replenish nutrients, and the baby’s intestinal function has not yet developed well, but also very fragile, so placed too long milk powder may breed a lot of bacteria that can cause indigestion in the baby, resulting in the baby diarrhea and other phenomena.