Organic Milk KefirMake your own tasty probiotic drinks - instructions and support provided. A generous heaped measuring teaspoon of milk kefir grains grown in certified organic milk. One teaspoon will ferment 1 cup (250ml) of milk every 24 hours. These are live grains which have never been dehydrated or frozen, they can be continually re-used so you should never need to buy more. Grains, Live, 15g.Dispatched First Class - orders posted Monday to Thursday only to avoid being in the post over the weekend. Securely dispatched in heat sealed packaging which easily fits through a letterbox.