Milk can be frozen in either waxed cartons or plastic containers (not bottles) that allow enough space for expansion. Skim milk freezes better than whole fat milk, which tends to separate on thawing. They can both be frozen for up to a month and then thawed slowly in the refrigerator. If the milk is going to be heated, the thawing process may be speeded up by heating it slowly from frozen.
** Asian Recipes