Can I heat breast milk in bags in BabyMilk? Does the BabyMilk require batteries? How long does it take to sterilize in BabyMilk? How much water do I need to add to the BabyMilk? What setting should I use to defrost food in BabyMilk? What voltage is the BabyMilk? Which bottles can I use with BabyMilk?