Like the "coffee cream in 20 portions" product, but with the difference that it is milk. So the fat content would be greatly reduced and instead of 15g of fat you would only have about 4g of fat per 100g.
I got the idea for this product in the States when I wanted to add cream to my coffee. I noticed that there were various types of "milk portions" for coffee. Such as "whole milk, semi-skimmed milk, vanilla flavored milk".