Is pumped milk really ok for 24 hrs in an insulated cooler bag? I left milk in the bag overnight. It's not warm, but doesn't feel esp cold (like if had been in the fridge) and the ice pack is no longer frozen. The milk was pumped yesterday and some of it was in the refrigerator for a few hours. It seems to smell and taste ok, but I don't usually smell or taste it, so I don't really know. Keep or toss? I don't have much of a stash but I don't want her to get sick!