12 month old baby is on continuous feeding during night @ 32 ml/hr. Instead of putting total amount of formula in feeding bag at once, to infuse over 9-10 hrs, I think formula should remain refrigerated, warming 32 ml at a time with hot tap water and adding to feeding bag hourly. Directions on can say to discard remaining formula after 1 hour when using a baby bottle. Does the same apply to use of feeding bag?