This is simply a perforated plastic platform on little adjustable feet. So it occurred to me to ask: what home-made solutions do you all use that is the equivalent to The Cooler Tray? I'm a person who hates, hates, HATES coolers in general because of the resulting soggy mess. We don't camp often enough for me to have been motivated to seek a solution and DH is oblivious and thinks coolers are fine, just fine.
Also, with The Cooler Tray, you must remove all the food to refill ice in the bottom, but I don't see a way around that.
So, yes, for a short weekend, filling containers with water and freezing them works as the mess-free cooling element. For longer trips, where you have to refill with ice on the road or at the campground, this won't work.
Digression: I did a 3-day float trip n the San Juan River (southern Utah) in May and one of the folks on the trip wrapped the top and sides of their cooler in Reflectix, and also placed a piece of reflectix inside the cooler, over the food. It worked well and I'm sure extended the life of the ice in the cooler by a significant amount.
Confession: On impulse, we bought a pop-up trailer two months ago. I'm already seeing the downsides. Hoping DH will too. It does not have a refrigerator.
