1, condensed milk is a milk product, fresh milk or goat's milk is sterilized and concentrated to make a drink, which is characterized by a longer period of storage. Condensed milk is "concentrated milk" of a kind, is the fresh milk by vacuum concentration or other methods to remove most of the water, concentrated to the original volume of 25% to 40% of the dairy products, and then add 40% of the cane sugar canning made.

2, condensed milk can be stored for a long time after opening the lid, generally refrigerated. Because condensed milk is highly concentrated whole milk, added nearly saturated sugar, when the Europeans invented such a high concentration of portable dairy products, is for long-term travel both easy to carry, but not easy to deteriorate. Because of the high concentration of desserts, it will make the moisture of the bacterial cells are penetrated and can not survive, so condensed milk after opening the lid is generally refrigerated on it.