If the room temperature is greater than 77 degrees f 25 degrees c do not let your breast milk sit out at all.
Room temperature breast milk storage.
Use breast milk storage bags or clean food grade containers with tight fitting lids made of glass or plastic to store expressed breast milk.
Once breast milk is brought to room temperature or warmed after storing in the refrigerator or freezer it should be used within 2 hours.
Storage time for breast milk deep freeze 0 f 18 c refrigerator freezer variable 0 f 18 c refrigerator 39 f 4 c cooler with frozen ice packs 59 f 15 c room temperature 66 f 72 f 19 c 22 c room temperature 72 f 79 f 22 c 26 c freshly pumped.
Place it in the refrigerator or an insulated cooler with ice packs immediately.
However it s optimal to use or properly store the breast milk within four hours especially if the room is warm.