My father in law frequently blasts Yeti coolers as an overhyped waste of money. I ended up with two coolers (Yeti and Pelican) so to wind him up, I did a side by side comparison. Here are the results if you care (to say I was bored at the time would be an understatement):
OK Charles, I know you've been concerned about Yeti's value proposition, so I conducted a controlled experiment with Yeti vs a similarly sized Pelican cooler. The Pelican is 30 quart and the Yeti is 35. The Yeti is materially thicker walled so the exterior dimensions look much greater than interior dimensions. (Photo 1)
I first put them side by side and open for 24 hours to bring the interior to the same ambient temp. (Photo 2)
I then place an identical blue ice in each one to pre-cool it. (Photo 3)
12 hours later I moved the coolers outside, out of the sun (to control for solar absorption due to color differences). I placed an identical can of beer in each cooler with a fresh blue ice and sealed them. I didnt have a laser measuring device to position the blue ice in the exact same relative position. So I used Heather to eyeball it since that is 12% more accurate than a laser. (Photo 4 and 5)
12 hours later I shot the cans with a laser thermometer in the exact same spot (opposite side of can from the blue ice in the middle of the "O" in "Wolf Pup"). The Yeti beer was 45.6* and the Pelican beer was 46*. (Photo 6)
7 hours later Yeti beer was 50.3* and Pelican beer was 53.1*.
5 hours later the Yeti was 58.6* and Pelican was 64.4* and 12 hours after that Yeti 64.4* and Pelican 67.4*.
I didnt adjust for the increased volume of the Yeti, but that would show the Yeti even better insulated because it still out performed even with a larger interior volume to keep cool.
Yeti is around 30% greater cost and provides 5 to 10% greater cooliosity. Probably closer to 10% because the early stages are more telling of insulation when there is greatest difference between internal and external temp.
This experiment received no outside funding...