Greek Yogurt for $1.10 a kilo!
One litre of long life milk, four dessertspoons of full cream powdered milk, one dessertspoon of Greek yogurt ( for subsequent batches use your old yogurt). Pour half the milk into the container, stir in the powdered milk, then the yogurt, fill up with the rest of the milk, stir again, screw on lid, fill the thermos up to the insert top with boiling water, place container in the thermos, put lid on thermos and leave for about 12-18 hrs. End result perfect yogurt. I am really happy with this system it is easy, cheap and delicious.