Breastmilk Storage

Hi Mummies, first time mom here.. pls pls pls share with me how do you keep your expressed breastmilk if you’re out for 12hrs with no access to freezer or fridge? I’m working in an office which do not have access to any of those and I’m using milk storage bags to pump out my breastmilk. I’ll leave house at 7-ish in the morning and be back home around 7-ish in the evening. And I need to pump 2 times at least in a 12-hr period if baby is not latching. Autumnz ice packs? V-cool ice bricks? A good cooler bag? Buy an ice maker and put in office? Buy a mini fridge? Help please, going back to work in March. 😭 #1stimemom #breastpump #breastmilkstorage #backtowork #milkstorage #milkstoragebag #milkstoragetips