Same Milk. Different process.

Milk boxes don’t require refrigeration until they're opened. This eco-friendly packaging keeps the milk safe and maintains the protein, calcium and other important nutrients. Your family can enjoy delicious, nutritious milk anytime, anywhere.
how shelf stable milk works

How UHT Milk Works


UHT Milk  vs. Pasteurization
UHT Milk Vs Pasteurization


uht milk - tetra pak

UHT Milk Technology

Shelf safe milk is what the industry calls UHT or Ultra High Temperature, meaning that the milk has been pasteurized at a higher temperature, but for a shorter time, to preserve taste and nutrition. UHT Milk is the most common product, but the process is also used for fruit juices (juice boxes), cream, soy milk, wine, soups and broth.

Pasteurization vs UHT
With pasteurization, milk is heated to 161-167 degrees Fahrenheit with a holding time of 15-20 seconds before it is cooled. Along with correct cooling, and chilled distribution, pasteurized milk has a shelf life of five to 15 days.

In UHT treatment, milk is exposed to brief, intense heating to temperatures in the range of 275-284 degrees Fahrenheit for only three seconds. Most importantly, UHT treatment is a continuous process which takes place in a closed system that prevents the product from being contaminated by airborne micro-organisms.

The UHT milk passes through heating and cooling stages in quick succession, then is immediately put into a sterile Tetra Pak shelf-safe carton. This process avoids any re-infection. The end result is a product that lasts up to six months without refrigeration or preservatives. This is known in the industry as aseptic milk packaging.


Cartons Keep Out Air & Light

The unique process of pasteurizing milk at an ultra high temperature, and then packaging it in the
Tetra Pak shelf safe carton, results in milk that is shelf safe. You've probably purchased juice, broth,
soup or soy milk in a Tetra Pak shelf safe carton. Their recyclable packaging protects what's good,
inside and out. > Learn more about Tetra Pak.

Aseptic Milk Packaging Layers

What is Tetra Pak made of?

Paperboard, made from wood from selectively harvested, regrown trees, is used to make the package stable, yet lightweight. Thin layers of polyethylene - a common plastic - are added to seal in the liquid and protect it from external moisture. A thin layer of aluminum foil protects products from oxygen, flavors and light.

For the environment

Tetra Pak cartons are recyclable and more efficient to transport than heavier packages or refrigerated products.

> Read more



It's Milk Unleashed! Thanks to Tetra Pak shelf safe cartons, nutritious,
delicious milk is ready to go wherever you go without the risk of spoiling.