Ready for consumption. After ensuring that the bottle, teat and lid are perfectly clean, boil them for 5 minutes. Shake before using. At the time of giving the bottle, pour the correct amount of milk (see the feeding table). Close the bottle and, if the milk is excessively cold, heat in a water bath until body temperature. Then give the baby the bottle. Once opened, store in the refrigerator for up to 24 hours.