Keep in mind that you can’t thaw milk at room temperature if you want to ensure it is safe for a baby. Never do that. Therefore, refrigeration of milk should be done first to allow defrosting before warming and feeding the baby. Using a warming bottle is more reliable and safe. Another good method is using a warm bowl of water with temperatures of about 99 Fahrenheit. Remember, the baby’s safety always comes first. Therefore, you cannot microwave milk that is frozen or boil it. This is a NO since there will be a loss of nutrients, and the milk will also be hot.