Breast milk at room temperature for 4 hours fridge for 2 days and freezer for three months. formula at room temperature for thirty minutes.

both of them shouldn't be stored outside a fridge, once the baby has started drinking from the bottle. bacteria will build up and may not be safe for baby. http://kellymom.com/bf/pumpingmoms/milkstorage/milkstorage/

what is the formula milk???