Bottled or bagged milk is pasteurized milk pasteurized milk, retaining some of the beneficial bacteria, beneficial to the human body. Pasteurized milk, under the cold chain preservation time is 7 days. Drink up on the same day you open the bottle at room temperature.

The same amount of boxed milk is cheaper than the same amount of bottled or bagged milk. Boxed milk is autoclaved and contains preservatives, and can be kept at room temperature for half a year, and can be kept under the cold chain for 2-3 years without deterioration. So bottled or bagged milk, to be better than boxed milk.