Finally got one of these Ozark Trail tumblers last week. I set an "email me when they are back in stock at my store" on Walmart.com. Got the email and went and ordered it online and chose Store Pickup. I wanted it for a coffee mug, as I tend to sip throughout the morning. I'd say it lasted about an hour and a half, as I was multitasking at work, and when I finished it, my coffee was almost (I'd say 90%) as hot as when I first poured it in. For $10, you can't beat this deal.
Also picked up the
Ozark Trail coozie (had to get from Amazon, as Walmart.com doesn't currently list these, that I could find, though they did have a Thermos one that looks similar) and I must say it works pretty well also. Popped in a bottle of Abita yesterday as I was grilling some burgers in the 95 degree LA heat (heat index well over 100). Let it sit outside as I went back and forth to fetch supplies, etc. and probably nursed it for about 20 minutes. Last few swallows were almost as cold (I'd say 90% also on this one) as when I opened it, and in that heat in a normal coozie, the beer would be room temp about 10 minutes in.