I never really had the need until they started having this sale. We drink almost a gallon a week between the two of us, sometimes a little more, sometimes a little less. I had heard somewhere about freezing it so I gave it a shot with one of the half gallons and it worked like a charm. You can't taste the difference. The only thing is that it takes awhile for it to defrost (like days) if you leave it in the fridge, so I usually will leave it in the sink for a couple hours. I don't leave it out until in completely defrosts, as I don't want to have warm milk, but I leave it until it is liquid but still icy.