I express my milk at work, i store my breast milk in avent container and put it in refrigerator ( not freezer ). I will prepare a cooler bag and ice pack. i will put my cold breast milk into the cooler bag together with the ice pack, so when i get home its still cold. then when i get home, i will store my ebm in e fridge and again not freezer, as these ebm will be consume by my baby girl the next day in school.
I will let my baby latch on when i go home and before going to work.
Never put your ebm in e freezer at work, because thaw milk cannot be freezed again, unless you going to feed your baby once you get home.