I was feeling adventurous so I bought one the newish Polar Bottle's that promise to keep your beverage cold for a longer period of time. Mine holds 24oz. So I transferred 24oz of Gatorade into the bottle and the bottle to my PUCH. It was a pretty hot day in Podunk as I set out. I was away for about 2 1/2 hours - and the Gatorade was still cool when I wheeled back to the ranch.
All in all: It's not a Thermos so it's not prone to breakage. And it did what it's claimed. It's a keeper.