You can get shelf stable milk in a PET box without the added tapioca, sugar, thickeners, and artificial ingredients that come with whatever this is.

I stock shelf stable (UHT pasteurized) 2% milk at home for when I go on a trip and don't want to go to the grocery store when I get home and still want cold milk in the AM. It keeps for months before opening.

Not sure why this is provisioned, but it seems pretty nasty.