Cooler/Bag help

I want to get a soft insulated bag to use as a cooler for the rear of my sportsman. I don’t want the rigid giant boxes. I want one that goes across the width of the atv and can hold 30-40 cans with ice and not leak out all over the seat and fenders. Is there such a thing? Ive seen the oft insulated cooler bags that hold 36 cans with ice for 24hrs at 100 degrees but these are hand bags. I really like this quad boss box but im not sure how it will work as a cooler. Moose makes one but its too small. Any help would be appreciated!

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