What’s the difference between milk in different types of packaging?

Glass-bottled milk typically boasts a higher aesthetic appeal and comes with a slightly premium price. Glass packaging helps preserve the milk's natural, authentic flavor to the fullest extent. Plus, it offers excellent barrier properties, making it resistant to heat, pressure, and cleaning processes. Most importantly, glass bottles are safe, hygienic, and boast outstanding corrosion resistance. Short-shelf-life pasteurized milk or daily-delivered milk varieties are almost always packaged in glass bottles.

Recently, a "social media-inspired transparent packaging" has become particularly popular among people—but in fact, this type of transparent packaging isn’t suitable for dairy products. Dairy is especially sensitive to light, making it particularly unsuitable for milk-based products that can be stored at room temperature.

The Tetra Pak is produced by the French company Tetra Pak using its aseptic packaging system. Only plastic packaging made from a three- to seven-layer black-and-white aseptic composite film or aluminum-plastic composite film—compressed together—is officially called Tetra Pak. It offers oxygen-barrier performance that is more than 300 times greater than that of conventional plastic films. This type of packaging effectively preserves the nutritional value of milk while ensuring its hygienic safety.

Ecklon-style packaging is commonly used for pasteurized milk and yogurt. This type of packaging material primarily consists of calcium carbonate, in addition to plastic, making it odorless, non-toxic, and offering excellent barrier properties. Ecklon packaging leaves minimal residue on the container walls, and its convenient inflatable handle design makes pouring even easier. Plus, it features a unique microwave-safe heating function specifically designed for pasteurized milk products.

The rooftop box packaging is made by pressing together three layers: an outer molded plastic layer, a middle fiber layer, and an inner layer of either cold-filled paper or hot-filled aluminum foil. Cold-filled versions typically have a shelf life of 7 to 30 days, while hot-filled options can last up to 3 months—and in some cases, even as long as 1 year.

Most of the packaging mentioned above are not suitable for microwaving—even when the package is opened and no longer sealed. Even under these conditions, the films and various coatings tend to be unreliable. Therefore, the correct heating method is to warm food indirectly using a water bath, ensuring the temperature remains low enough to prevent melting of the contents.