I’m not sure how to interpret the guidelines for this ...

I pumped this last night and refrigerated immediately. I took out of the fridge around 7am and have it in my (slightly insulated) backpack pocket with two rectangular ice packs. It doesn’t seem like it stays super cold but must be better than nothing.

How long do you think i can use it safely? I can’t refrigerate again until maybe 3pm but was hoping to save some of it beyond that.