honestly IMHO i feel there is no need to splurge that much on a cooler bag if you have a fridge that you can use in office to store your EBM during the day. there is a fridge in my office, fortunately, so i only use my cooler bag for a couple of hours to ferry my EBM from office to work (sometimes drop by the supermarket or take dinner outside before home). i use the $2 cooler bags amd $2 reuseable ice blocks from diaso. cheap and good. my boy has never had any tummy ache or any other problem drinking my EBM for the past 7 months.
i am a practical mom .... ;p