I bought 3 of them in Alaska 3 weeks ago as well kept ice for several hours. I got the 20oz ones and paid 8 bucks for them.
We bought a few yetis some time ago, a year or more probably.
In TX heat my wife who works out in the field a lot, puts ice in hers around 730 am, then puts her tea over the ice at noon.... and there is still ice left at 530 or so when she gets home, having been out and about in the heat, her work vehicle, her office and so on. With our heat, its pretty impressive.
We have the ozark trails too, and while they are decent they have not been as good in the summer as the yetis.
FWIW.
