Bagged for 28 days and boxed for 6 months. There are two kinds of Yili pure milk: boxed milk and bagged milk. The shelf life of bagged Yili pure milk is 28 days, and the storage condition is in a cool and backlit place, while the shelf life of boxed Yili pure milk is 6 months under the sealed condition at room temperature. Under normal circumstances, pure milk that has passed the shelf life can no longer be drunk, but milk will not go bad on the day of shelf life, so milk can still be drunk without deterioration at the shelf life. However, even if Yili pure milk has not deteriorated for ten days, it contains almost no nutritional value, so it is best not to drink it.