Hello,
I've only found Aha lactose-reduced milk in 1-litre packs and only whole milk. Would it be possible to extend your range to include 1/2-liter cartons, as well as partially skimmed milk? One liter is far too much for a single person, so it would be less wasteful, and partially skimmed milk would meet with the approval of those who have to monitor cholesterol levels.
I know there are other types of milk (oat, almond, etc.), but the taste isn't the same and doesn't suit the preparation of mashed potatoes or custards, for example. Thank you for thinking about it and best regards.