A milk bag is a plastic bag that contains milk. Usually one of the corners is cut off to allow for pouring, and the bag is stored in a pitcher or jug.
A typical milk bag contains approximately 1 L (1.8 imp pt) of milk in South America, Iran, Israel, and continental European countries, while in Canada they contain 1+1⁄3 L (2.3 imp pt), and in India, 0.5 L (0.9 imp pt).[1]
In the Baltic rim countries, e.g., Estonia, and some Eastern European countries, the similar bags may also be seen used for packaging yogurt or kefir.