I've got the RTIC soft bag. It works very well. I was planning to post a review, but guess I forgot.
At Hale, it would hold water and drinks in ice all day in very hot weather and regular opening and closing. I assume it would likely last for a day and a half, but I refilled on my second morning because I cared more for cold water than test results. It's perfect for what I wanted it for.
Stock pic, because I won't remember to take one
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