I’ve got a Yeti coffee mug I received for Christmas. I’ve got to say, it’s pretty amazing at keeping liquids hot. I fill it in the morning, drive for an hour to the ski hill, leave it in the unheated car for six hours and when I come back, the coffee’s is still sort of warm. Not hot, but at least, not cold either.
"Too often I have met men who boast only of the miles they've traveled and not of what they have seen." - Louis L'Amour
My fridge quit and I needed to bridge some time. I checked the reviews and it got the best regarding time, so I bought it. It did not disappoint, in fact the ice hardly melted at all per day. I was surprised. Looks too $$$ to leave exposed in the back of a car, though. Yes, it was expensive, yes, it looks cool. Yes, they advertise. So? Tell me about your $700 tents.
Overpriced? Yes. Suck? No. I would neever buy one for myself, but I have a small Yeti cooler my wife gave me for a birthday present many years ago. She bought it primarily for me to use on multi-day canoe camping trips. For that purpose, and short car-camping trips, it works great. I've gone on backpacking trips up to 5 days and returned to my car at the trailhead, beer still packed in ice.
I have walked myself into my best thoughts, and I know of no thought so burdensome that one cannot walk away from it. -Soren Kierkegaard
I think science says that all of those double-walled vacuum sealed drink bottles all perform about the same at keeping liquids warm/cold. You can use them more effectively by pre-heating/cooling and filling up the volume.
I've admittedly upgraded my coolers in the last few years to the newer 'boutique' ones and have the Yeti backpack-like one that I got as a gift. It's a nice complement to the hard-sided RTIC one I'd gotten (after much hemming and hawing) but I was totally floored when I saw the price in a store... literally twice as much as the RTIC. The Yeti's don't suck but I do think they're grossly over-priced. I guess their colors are cool...
I considered Yeti at one point, but all that insulation comes with a size issue, or did at that time—just too bulky for the space inside. I guess I could afford the space now, but I have my packing system dialed in so no motive to change.
The company gave me a Yeti mug, which I ended up liking quite a bit. I'm quite happy with how long it keeps things warm. As jazzmom noted, a minute or two of pre-fill with boiling water extends the duration quite a bit.
Once or twice a year, I leave a cooler in a car (in the summer) while I'm gone backpacking for a week. It's not an urgent thing, but if I've been car-camping before the BPing (which is typical for me), it's nice to be able to save some of the food, and a REALLY nice luxury to crack open a cold (or at least cold-ish) beer on returning to the car.
But I'm fairly cheap, so there's no way I'm going to pay what a large Yeti cooler costs for that one or two times a year. I use a regular cooler, try to fill it as full as possible with ice+food/beer, wrap a blanket around it, and hope for the best.