100% REAL Shelf-Stable Milk that stays fresh for months! All-Natural without any preservatives. Natrel shelf-stable milk has all the same nutritional value as real 100% milk, because it is real 100% milk. The Ultra High Temperature (UHT) pasteurization is used to remove dangerous organisms from the milk before it is boxed. This process allows you to get the same benefits as traditional milk, while allowing months of shelf life before it needs to be used. When you’re ready for wholesome deliciousness, just chill and refresh your taste buds.