One of Mengniu's promotional slogans is: "A pound of milk a day, strong Chinese people," I believe everyone should remember. Milk is highly nutritious, so it is worth advocating drinking a pound of milk a day to supplement nutrition, especially for children in the growing stage, which is beneficial to physical development. However, milk is not easy to preserve. If placed in a regular cup, it will spoil easily. Therefore, this compressed milk cup is worth recommending. This milk cup can minimize the contact between milk and air. It works like a spring. When you press the top button, a sealed valve on the cup lid will open and compress the cup, causing the milk to overflow. As the milk decreases, the milk cup will become shorter and shorter, just like a compressed spring. When you close the sealed valve, the cup will be as high as the amount of milk inside. Using such a compressed milk cup to store milk will keep it fresher than using a regular cup.