There has been a slight revision to the preparation instructions for SMA LF Lactose Free Infant Milk, please pay extra attention to Step 5: Place the sterilised teat and cap on the bottle, immediately shake vigorously until the powder is fully dissolved. Cool bottle under cold running water or in a bowl or jug of cool water until lukewarm, do not immerse the teat. For more information on the preparation instructions please contact the SMA Careline.