As early as the 1950s, Tetra Pak was one of the first companies to provide packaging for liquid milk. Since then, it has become one of the world's largest suppliers of milk, juice, beverage and many other product packaging systems.

Tetra Pak's "brick bag" and "pillow bag" are common paper packaging for milk and beverage. They are classic works of moderate packaging. In September 2004, at the exhibition of "simple classics" at the Museum of modern art in New York, Tetra Pak was praised as a masterpiece of moderate packaging "full of design inspiration, making life simpler, more convenient and safer". The small Tetra Pak, which embodies a lot of technology and wisdom, is simple but not luxurious, which has brought great changes to our life. The high-quality milk in the northern prairie of China can be easily delivered to thousands of households thousands of miles away by virtue of Tetra Pak.

Tetra Pak has found a good balance between protection and emotional needs. Compared with plastic bottles and glass bottles, Tetra Pak bags with brick and pillow types have a larger volume ratio, and this packaging shape is easier to pack, transport and store. From a technical point of view, Tetra Pak is a six layer composite paper package composed of paper, aluminum and plastic, which can effectively block the air and light, which are the killers that easily make milk and drinks go bad. Therefore, the small Tetra Pak makes the consumption of milk and beverage more convenient and safe, and has a longer shelf life, and achieves higher packaging efficiency.

To sum up, the reason why milk box is called "Tetra Pak" is that our common milk box is a packaging product developed by Tetra Pak company in Sweden, and its market coverage is very large. This brand name gradually replaces the product name in the industry. It's the same reason that SUVs were called jeeps in the early days of China.